.460 Weatherby Magnum
Encyclopedia
The .460 Weatherby Magnum is a belted, bottlenecked
rifle cartridge
, developed by Roy Weatherby
in 1957. The cartridge is based on the .378 Weatherby Magnum
necked up to accept the 0.458 inches (1.2 cm)
bullet. The original .378 Weatherby Magnum parent case was inspired by the .416 Rigby
. The .460 Weatherby Magnum was designed as an African dangerous game rifle cartridge for the hunting of heavy, thick skinned dangerous game. The cartridge is billed as the most powerful commercial sporting rifle cartridge available.
The .460 Weatherby Magnum like the rest of the Weatherby line of cartridges is capable of launching a bullet at velocities much higher than its competition, and in doing so it generates higher levels of energy. The .460 Weatherby attempts to provide the ultimate level of insurance against dangerous game. Few cartridges come close to offering the hunter the level of performance offered by the Weatherby Magnum.
The .460 Weatherby Magnum is the world's most powerful commercially available sporting cartridge. The .460 will launch a 500 gr bullet at a chronographed velocity of 2700 ft/s (823 m/s) from a 26 inches (66 cm) barrel, measuring 8100 ft·lbf (10,982.1 J) of muzzle energy. Prior to the arrival of the .460 Weatherby Magnum on the hunting scene, the .600 Nitro Express
had been considered to be the most powerful cartridge in terms of energy.
had expected that the .378 Weatherby Magnum to make some head way in the African Continent but believed that his cartridge was being bypassed for low velocity, big bore cartridges by professional hunters who he felt were resistant to change. Furthermore, new regulations prohibiting the hunting of heavy, thick skinned, dangerous game with sub .40 caliber (10.16 mm) cartridges were being enacted in some African countries. These regulations would essentially ban the use of all previous Weatherby cartridges for the hunting of elephant, African Cape buffalo and rhinoceros.
In response to these factors, Roy Weatherby believed that it was necessary to provide hunters a Weatherby cartridge that could be used to hunt African dangerous game in the countries which had legislated against hunting with sub .40 caliber (10.16 mm) rifles. He accomplished this by necking up the .378 Weatherby Magnum case to accept a .458 caliber bullet. He named the new cartridge the .460 Weatherby Magnum. The first rifles for the .460 Weatherby Magnum were built on Brevex Magnum Mauser action.
However, Roy Weatherby was not the first cartridge designer to neck up the .378 Weatherby Magnum to .45 Caliber (11.6 mm). That distinction belongs to John Bushmiller, a gunsmith and hunter from Montana. Bushmiller named his cartridge the .45 Weatherby. He had success with the cartridge in Africa shooting Cape buffalo and rogue elephants in 1956, a year before Roy Weatherby began work on his own .45 caliber (11.43 mm) cartridge.
Norma Precision of Sweden was the first and only manufacturer of .460 Weatherby Magnum cases and ammunition which carried the Weatherby name and has done so under contract from Weatherby. During Weatherby’s partnership with J.P. Sauer/Dynamite-Nobel, production at Norma ceased and shifted to RWS, a wholly owned subsidiary of Dynamite-Nobel. However, RWS did not tool up in time to produce the .460 Weatherby Magnum cartridge and in the end only produced substandard .300 Weatherby ammunition before production once again moved to Norma.
DuPont at one time shipped DuPont No. 4350 powder to Norma Projektilfabrik for the reloading of Weatherby Ammunition. But some time later Norma was able to source a powder with similar burn characteristics locally which was used instead of DuPont's IMR 4350. Norma would later purchase the company and rename the powder Norma 204.
(SAAMI) established voluntary specifications for the cartridge in January 1994. The Commission Internationale Permanente pour l'Epreuve des Armes à Feu Portatives
(CIP) has also provided specifications for the cartridge to which all member states must comply when exporting, importing or manufacturing ammunition.
The .460 Weatherby Magnum is designed to headspace on its belt. The close chamber tolerance of Weatherby rifles indicate that these rifles do indeed headspace on the belt rather than the shoulder, unlike most modern belted cartridges which headspace on the shoulder regardless of the belt; the few exceptions being the .375 H&H Magnum and the .300 H&H Magnum. SAAMI recommended chamber dimensional tolerance range does allow for the headspacing to take place on the shoulder if need be.
Diagram reflects SAAMI
dimensions for the .460 Weatherby Magnum. CIP dimensions for the r1 (inside shoulder radius), r2 (outside shoulder radius), L1 (height from base to shoulder), L2 (height from base to neck), S (shoulder angle intercepts the center line) and the α dimensional value (shoulder angle) conflict with SAAMI dimensions. This is due to how the L1 and L2 values are defined in relation to the centers of the r1 and r2 dimensional values by CIP. The following table provides the conflicting values provided by SAAMI and CIP.
Like all Weatherby Cartridges, the .460 Weatherby Magnum cartridge has a double radius shoulder where the body and the neck are connected with a continuously curving shoulder; the curve of which reverses at the point of tangency. SAAMI defines the length to the shoulder as the demarcation point where the bottom of inside curvature radius (corresponding roughly to CIP's r1) of the shoulder begins and the length to the neck as where the outside curvature radius (approximating CIP's r2) meets the neck. However, CIP does not define the location of the centers of the r1 and r2 whereas SAAMI provides this as being in inline with the length to the shoulder (inside radius) and length to neck (outside radius). This is due to the CIP treatment of r1 and r2 values as fillet radii as they do with many other cartridges.
SAAMI recommends a maximum chamber pressure rating of 65000 psi (4,481.6 bar) while CIP provides a maximum chamber pressure rating of 4400 bar (63,816.6 psi).
Weatherby no longer provides a long leade (freebore) for the cartridge. Currently Weatherby provides 0.756 inches (1.9 cm) of freebore for the .460 Weatherby in the Weatherby Mark V rifle. CIP recommends that rifling commence at 0.975 in (24.8 mm) from the case mouth reflecting the longer leade provided by Weatherby in the early 1960s. SAAMI recommends the present leade provided by Weatherby of 0.756 inches (1.9 cm).
Twist rate is given as 1 in 16 by Weatherby which would stabilize bullets up to 600 gr and mono-metal bullets. Weatherby provides a 6 grove contour #4 barrel for the .460 Weatherby Magnum. Ø land is given at 0.45 in (11.4 mm) and Ø groove is 0.458 in (11.6 mm). The recommended land arc width by both SAAMI and CIP is 0.175 in (4.4 mm).
or monolithic solid type bullet will penetrate more than 40 in (1 m) when impacting a dangerous game animal such as the Cape Buffalo or African Elephant. The .460 Weatherby Magnum has few peers for stopping dangerous African game.
Compared to its contemporaries, the 460 Weatherby Magnum has more energy at 150 yards than the .458 Winchester Magnum does at the muzzle and at a 100 yards more energy than the .458 Lott with factory ammunition. The .460 Weatherby Magnum provides a significant step up in performance over other production .458 caliber (11.6 mm) cartridges. The increased performance is realized in terms of both remaining energy and extended range.
The .460 Weatherby Magnum like the .375 H&H Magnum is a relatively flat shooting cartridge. The maximum point blank range
(MPBR) for the 450 gr Weatherby load is 258 yards (235.9 m). The 500 gr Weatherby factory ammunition has a maximum point blank range of 245 yards (224 m). These trajectories compare well with those of the .375 H&H Magnum
. At 200 yd (182.9 m) Hornady's Interlock .375 H&H Magnum's 270 gr bullet drops 11.3 in (28.7 cm) while Hornady's DGX 300 gr bullet drops 13.8 in (35.1 cm). In contrast the .460 Weatherby Magnum's 450 gr (B460450TSX) drops 12.3 in (31.2 cm) and the 500 gr (H460500FJ) drops 12.7 in (32.3 cm). The .460 Weatherby Magnum, however, averages over 75% greater energy than the .375 H7H Magnum.
Compared to the more popular .458 Winchester Magnum and the .458 Lott, the .460 Weatherby Magnum provides a flatter trajectory, dropping less than 10 inches (25.4 cm) at 300 yards (274.3 m) when sighted in at 200 yards (182.9 m) with the 450 gr. Barnes TSX Weatherby ammunition. With the 500 gr FMJ or RN Weatherby ammunition bullet drop is 11 inches (27.9 cm) at the same range. The .458 Winchester Magnum and the .458 Lott have a 206 yards (188.4 m) and 220 yards (201.2 m) MPBR respectively in comparison. The 500 gr FMJ or RN Weatherby ammunition shoot to the same point of impact, which is necessary in a dangerous game cartridge as hunters may need to switch from solids to soft round nose rounds depending on the circumstances and game being hunted. This is due to Weatherby's (Norma) factory loaded ammunition using Hornady's DGS and DGX bullets which have identical G1 ballistic coefficients of .295.
The ability of the .460 Weatherby to carry the energy and velocity required to take heavy, tough skinned dangerous game combined with the flatter trajectories it provides, gives the shooter the ability to take game species at longer ranges than its competition. The stand-off ability assures a greater margin of safety when hunting dangerous game species as the hunter need not get as close to the game as with other cartridges. Furthermore, this lessens the need to compensate for bullet drop and target size. However, for practical reasons, most dangerous game are shot at close ranges of less than 60 yd (54.9 m).
Bullets available for the .460 Weatherby Magnum range from 300 gr. Velocities with these bullets vary from 2500 feet per second (762 m/s) with the 600 gr bullet to 3100 feet per second (944.9 m/s) with the 300 gr bullet. The good sectional density and ballistic coefficients of these bullets, particularly spitzer bullets available, give the cartridge the ability to conserve velocity in flight and provide deep penetration on game. The wide range of bullet weights available and the ability tailor the performance the .460 Weatherby Magnum gives the cartridge a performance envelope unmatched by most cartridges. The combination of velocity and bullets of very good sectional density contributes to the .460 Weatherby Magnum's excellent penetration on game provided the toughest bullets are employed for the task.
As with other most other cartridges, the Weatherby’s performance with mono-metal bullets is slightly poorer than with conventional bullets. Mono-metal bullets tend to be longer for a given bullet weight than conventional lead core bullets. For this reason, the mono-metal bullets similar to the Barnes TSX may have to be seated more deeply into the case displacing volume which could be filled with the propellant. A loss of velocity of 50–100 ft/s (15.2–30.5 m/s) can be expected with these mono-metal bullets. Likewise bullets which have a higher specific gravity than lead, such as the tungsten core Speer African Grand Slam solids being shorter than conventional FMJ bullets will allow for more powder capacity and therefore a higher velocity.
The performance level of the Weatherby cartridge comes at a cost: recoil. The recoil of the .460 Weatherby Magnum is severe. The cartridge generates close to 100 ft·lbf (135.6 J) of energy. This is in keeping with Newton's inescapable Third Law of Motion: Every action has an equal and opposite reaction. As performance levels rise, so does the recoil. Put into perspective the recoil of the .460 Weatherby is 120% greater than the .375 H&H Magnum, 50% greater than the .458 Winchester Magnum and 20% greater than the .458 Lott.
The .460 Weatherby Magnum compares well with the classic English big bore cartridges; it exceeds all these cartridges in velocity, energy, trajectory and penetration. Cartridges such as the .500 Jeffery
, .500 Nitro Express
, .505 Gibbs, .577 Nitro Express
, .600 Nitro Express
do however provide a larger diameter bullet while the latter two cartridges are also capable of launching heavier bullets than the .460 Weatherby Magnum. At present only the modern classic .700 Nitro Express
, which is barely a production cartridge, exceeds the performance of the .460 Weatherby and then in only a single category: energy. Cartridges such as the .475 A&M Magnum, .500 A-Square, and the .550 Magnum which are based on the .460 Weatherby Magnum can exceed the performance of the parent cartridge, however, these are considered wildcat and proprietary cartridges.
, hippopotamus
and the rhinoceros
. The .460 Weatherby Magnum when loaded to its full potential has little use outside its primary design purpose. Although the cartridge is can be used to hunt any species of game, there are far better cartridge choices which offer a greater flexibility of use when hunting big game animals.
It has more than the required energy necessary to drive 450 – bullets into the elephant's vital organs from any angle provided that the bullet is up to the task. Generally, elephants require solid bullets especially if one is contemplating shooting it in the brain. Monolithic bullets such as the A-Square Monolithic Solid, Barnes Banded Solid, Supreme Nosler Solid and more conventional tougher FMJ bullets such as the Hornady DGS are good choices as they are able to withstand stresses placed on the bullets by the velocity of the .460 Weatherby Magnum. At the 250 yd (228.6 m) mark, the .460 Weatherby has enough remaining energy and velocity to make quick kills on elephant. At this range its impact energy is comparable to that of the .458 Winchester Magnum at 65 yd (59.4 m) However, as elephant hunting is usually a close range affair where 90% of the shooting situations fall within 60 yd (54.9 m) the fact that the .460 Weatherby can fell an elephant at long ranges is mostly an academic argument at best.
Bullets in the 400 gr range are excellent for African cape buffalo and rhinoceros. A combination of solids and expanding bullets may be used against these big game. Expanding bullets should be of the controlled expansion variety. Rapidly expanding bullets are to be avoided. A-Square Dead Tough, Barnes TSX, Hornady DGX and similar toughly constructed expanding bullets are recommended. As with the solid bullets, expanding bullets for the cartridge should be rated to perform well at .460 Weatherby velocities.
The .460 Weatherby is overly powerful for lion or leopard. Lion are thin skinned and weigh no more than 600 lb (272.2 kg) while leopards weigh no more than 250 lb (113.4 kg). When the .460 Weatherby is used for hunting leopard or lion, a rapidly expanding bullet is normally used. Bullets ideal for lion or leopard begin with the 300 gr bullets. A-Square's Lion Load, a fragmenting 465 or soft point is one such load appropriate for the big cats. Apart from the A-Square Lion Load bullets ranging in weight from 300 gr are better used on lion and leopard. Since the .460 Weatherby can drive these bullets at over 3000 ft/s (914.4 m/s), and the large felidae are susceptible to hydrostatic shock, these lighter weight bullets in relation to the caliber may provide the best option if the .460 is chosen for the big cats. However, as no mainstream ammunition manufacturer loads these bullets, tailoring such loads for lion or leopard is strictly an option available only to the handloader or for those willing to have custom ammunition made to order.
The capability of the .460 Weatherby Magnum to hold flatter trajectories with appropriate bullets provides the cartridge the ability to take African plains game at distances beyond 250 yards (228.6 m) with no holdover adds to the versatility of .460 Weatherby Magnum as an all round African cartridge. However, while the .460 Weatherby has the capacity to take such game species, there can be little doubt of the fact that there are more suitable cartridge choices for these species with far less recoil than the .460 Weatherby Magnum.
The .460 Weatherby is one of the very few rifle cartridges approved by the International Whaling Commission
for the harvesting of whales. The cartridge was deemed to have the penetration necessary to penetrate to the brain stem to provide a quick kill on whales. The Makah people of the Pacific Northwest
have used this rifle cartridge for decades hunting whales.
While the .460 Weatherby Magnum is powerful cartridge, it cannot make up for inexperience or poor marksmanship. As with any rifle cartridge that produces heavy recoil, recovery time between subsequent shots should be taken into account when choosing such cartridges for hunting dangerous game.
North American big game does not require the full power of the .460 Weatherby Magnum. Harvesting of bison
, elk
, moose
and brown bear
can be accomplished by reducing the performance of the cartridge to match the requirements. The .460 Weatherby Magnum cartridge has the flexibility to be loaded to duplicate the performance of the .45-70 Government to the .450 Rigby
. An advantage is the significantly lower recoil of such loadings.
The Weatherby Mark V is the most popular rifle chambered for the .460 Weatherby Magnum cartridge. The rifle stock is engineered to minimize the felt recoil of heavy recoiling cartridges. The California Style Monte Carlo stock’s slanting comb will under recoil push away from the shooter’s face. The rifle stock is also designed with a generous cast off to help tame the heavy recoil of the .460 Weatherby Magnum. The rifle uses an aluminum bedding block and recoil lugs to prevent any movement between the stock and the action. At a point of time the .460 Weatherby Magnum was offered for sale as an over the counter item in a few Mark V rifle lines, however, at present it is only available in the Mark V Deluxe. The Weatherby Custom Shop does offer the rifle in a few lines such as the Crown Custom, Dangerous Game Rifle (DGR) and the Safari Custom. All the over the counter and custom shop rifles are built on the Mark V action which is regarded by many as one of the strongest rifle actions available. The first .460 Weatherby’s were built on Magnum Mauser actions but these were found wanting due to the higher pressures generated by Weatherby cartridges. The Mark V action is able to contain 200000 psi (13,789.5 bar) pressure.
A-Square currently offers rifles chambered .460 Weatherby Magnum in the Hannibal (right handed) and Caesar (left handed) lines. The rifles are based on the Enfield P14 design and like the Weatherby’s are designed to minimize felt recoil. The rifles are ruggedly build to perform well with hard recoiling cartridges such as the .460 Weatherby Magnum, .500 A-Square, .577 Tyrannosaur. Dumoulin Herstal of Belgium manufactures rifles for the cartridge in their proprietary A2000/LM Long Magnum Mauser action White Hunter rifle line. The Dumoulin White Hunter is also available in .416 Rigby, .500 Jeffery and 505 Gibbs. Apart from these companies, several custom rifle maker such as Ballard Arms and Empire Rifles provide custom rifles in this chambering.
Weatherby ammunition is billed as Ultra Velocity Ammunition by Weatherby. Typically, Weatherby cartridges exhibit velocities greater than 200–300 ft/s (61–91.4 m/s) over the more popular similar caliber cartridges. Early Weatherby ammunition was loaded to near maximum pressures. Since then, however, Weatherby has backed off from these pressures. The resulting factory ammunition is about 100 ft/s (30.5 m/s) slower than early Weatherby Ammunition.
Currently ammunition is available from A-Square, Conley Precision Cartridge and Weatherby (Norma) among others. Factory ammunition is loaded with 350 gr to 600 gr bullets. Factory ammunition are relatively expensive costing between $6.00 and $8.50 per cartridge.
s are equipped with open sights the typical Weatherby Mark V rifle chambered for the .460 Weatherby Magnum does not come equipped with open sights. Instead they are drilled and tapped for scope mounts. The cartridge’s performance even at 200 yd (182.9 m) leaves enough energy necessary to bring down large dangerous thick skinned game. At these ranges, telescopic sights have a greater advantage than open sights. The stock itself is designed for with the intent of providing the shooter a higher line of sight which is consistent with the use of telescopic sights.
Weatherby Rifles such as the Dangerous Game Rifle and other Weatherby factory custom offerings are provided with open sights. Open sights tend to sight in quicker than scoped rifles and for this reason open sighted rifles are preferred by hunters for back-up work—when the hunter and/or guide must mount and discharge their firearm to ensure a charging game animal does not injure a client or to deliver a coup de grâce to a wounded game animal. It also has the added benefit of preventing the hunter from getting his eyebrow cut by the scope, which is not uncommon with a firearm with as much recoil as the .460 Weatherby Magnum.
The Recoil
of the .460 Weatherby Magnum presents a problem for many shooters when shooting a cartridge of this size. Even with a 12 lb (5.4 kg) rifle (scope, base, rings and cartridges included) the recoil against the shooter's shoulder is measured at 100 ft·lbf (135.6 J). Compare this to most rifles chambered in .30-06 Springfield
which develop an average of 20 ft·lbf (27.1 J) of free recoil
. Recently Weatherby has offered some reduced loads in the 7500 ft·lbf (10,168.6 J) range, in order to be more forgiving to shooters. The recoil of the full-power loads is very punishing and if the gun has a scope, scope cuts on the forehead are common. A factory powder charge for this cartridge is about 115 gr.
For many years the Weatherby Mark V rifles chambered in .460 Weatherby were equipped with a Pendleton muzzle brake
to help alleviate the effects of recoil. The Pendleton muzzle brake is a integral braking system installed by porting the rifle barrel and once cut into the barrel cannot be reversed. All current Weatherby Mark V rifles chambered for the .378 Weatherby Magnum and its derivatives are provided with the Accubrake as a standard accessory with the rifle package. The Accubrake reduces felt recoil by about 53%. Unlike the earlier Pendleton muzzle brake, the Accubrake is a removable, screw-on type brake. The use of muzzle brakes is frowned on by the hunting community in particularly in guided hunting situations involving dangerous game. The Accubrake being a removable accessory can be reserved for sighting in. According to Weatherby, the removal of the Accubrake will not change the point of impact.
As factory loaded ammunition for the .460 Weatherby Magnum is optimized for only heavy dangerous game, the reloader will gain a great benefit from reloading for the .460 Weatherby Magnum. Reloading the .460 Weatherby Magnum is no more difficult than reloading any other belted magnum cartridges. The reloader has a wide variety of components, bullets and powders available. Tailoring a load to a certain performance level or for specific game is reason enough to reload the cartridge.
Among bullet manufacturers Barnes, Hornady and Lyman provide reloading data in their manuals for the .460 Weatherby Magnum. Powder manufacturers Accurate Arms, Hodgdon and Norma have also provide reloading data for the cartridge.
In addition bullets there are several hard cast 0.458 in (11.6 mm) diameter bullets that are compatible with the .460 Weatherby Magnum. Such bullets, unlike jacketed bullets, are designed to be driven at reduced velocities. Driving these bullets at .460 Weatherby velocities can cause lead to be deposited in the barrel. Regular cast bullets are not recommended with the .460 Weatherby as the upper end of the permissible velocities for these cast bullets is lower than the lowest velocities obtainable from the .460 Weatherby Magnum.
For reduced velocity reloads powders such as Accurate Arms AA8700 and Hodgdon’s H870 have performed well. With AA8700 and H870 there will remain a large quantity of un-burnt powder which can be annoying. Faster powders, if used, will occupy less volume; so a filler such as Dacron is used to hold the powder charge against the primer to provide shot to shot consistence and reliable ignition.
In a pinch the Winchester WLRM primer or primers with similar brisance may be substituted. The Federal 216 primer is not available for sale to the reloader at present but should the primer become available it may be substituted for the Federal 215 primer. This primer was developed for the .470 Nitro Express and is currently used by Federal to load the cartridge.
, .585 Nyati
, .600 Overkill
and all Nitro Express
line of cartridges. However, the 460 Weatherby Magnum was beset by penetration issues from the beginning. Safari hunters had reported variously that the 500 gr round nose bullets fragmenting and that the solids deforming and core separation which lead to poor terminal performance on heavily boned animals. In such cases, the energy of the bullet is expended through the work performed deforming or disintegrating the bullet rather than directed towards the more productive penetration which is the sole reason for the use of these solid bullets.
Early Norma
factory ammunition loaded for Weatherby used Hornady
500 gr RN and FMJ. Norma had been loading these bullets to a velocity of 2700 ft/s (823 m/s). Norma dropped the velocity of the cartridge to 2650 ft/s (807.7 m/s) while Hornady introduced the mechanically locked-in lead core InterLock bullets in 1980 to improve the terminal ballistics of their bullets. Subsequently, Hornady introduced the 500 gr InterBond FMJ (IB-FMJ) and RN (IB-RN) bullets which featured a brass jacket with a welded lead core. The IB-FMJ and IB were loaded by Norma for the Weatherby cartridge. These Hornady .458 caliber round nose and solid bullets were later found to have a performance envelop of not exceeding 2300 ft/s (701 m/s) in the .458 caliber.
Hornady has since developed the copper clad steel encased bonded core DGX and DGS bullets rated for a velocity of 2600 ft/s (792.5 m/s). The new Hornady DGX and DGS bullets are now being loaded by Norma at the reduced velocity of 2600 ft/s (792.5 m/s) to coincide with the velocity rating of the tougher DGS and DGS 500 gr bullets. Hornday's performance envelop for the .458 caliber 500 gr DGX and DGS bullets are between 2600 ft/s (792.5 m/s) and 1600 ft/s (487.7 m/s) the same rating they had assigned earlier to the more lightly constructed InterLock bullet.
While poor penetration due to bullet construction was not limited to the .460 Weatherby Magnum, the issue was more magnified in the this cartridge than others due to the additional stress imposed on the bullet by the higher velocity of the cartridge as is the case with the .375 H&H Magnum cartridge firing the 300 gr solids at 2530 ft/s (771.1 m/s). Using premium, stoutly constructed premium solid bullets similar to the Barnes Banded Solid, Hornady DGS, Nosler Solid, Speer African Grand Slam Solid and others have resolved this problem.
The following are some of the better known cartridges based on the .460 Weatherby where the .460 acted as the direct parent cartridge:
.460 A-Square Short
.465 H&H Magnum
.475 A&M Magnum
.500 Whisper
.50 Peacekeeper
.500 A-Square
Necking (engineering)
Necking, in engineering or materials science, is a mode of tensile deformation where relatively large amounts of strain localize disproportionately in a small region of the material. The resulting prominent decrease in local cross-sectional area provides the basis for the name "neck"...
rifle cartridge
Cartridge (firearms)
A cartridge, also called a round, packages the bullet, gunpowder and primer into a single metallic case precisely made to fit the firing chamber of a firearm. The primer is a small charge of impact-sensitive chemical that may be located at the center of the case head or at its rim . Electrically...
, developed by Roy Weatherby
Roy Weatherby
Roy E. Weatherby was the founder and owner of Weatherby, Inc., an American rifle, shotgun and cartridge manufacturing company set up in 1945. Weatherby created an entire line of custom cartridges, and was one of the people responsible for the industry interest in high-speed cartridges...
in 1957. The cartridge is based on the .378 Weatherby Magnum
.378 Weatherby Magnum
The .378 Weatherby Magnum was designed by Roy Weatherby in 1953. It was an original belted magnum design with no parent case, inspired by the .416 Rigby and headspacing of the belted .375 H&H Magnum. The 215 magnum rifle primer was developed by Federal specifically for this round. The cartridge can...
necked up to accept the 0.458 inches (1.2 cm)
11 mm caliber
This article lists firearm cartridges which have a bullet in the through caliber range.All measurements are in millimeters .-Pistol cartridges:-Revolver cartridges:-Rifle cartridges:-See also:...
bullet. The original .378 Weatherby Magnum parent case was inspired by the .416 Rigby
.416 Rigby
The .416 Rigby or 10.6x74mm was designed in 1911 by John Rigby & Company of London, England as a dangerous game cartridge and is the first one to use a bullet with a diameter of .416"...
. The .460 Weatherby Magnum was designed as an African dangerous game rifle cartridge for the hunting of heavy, thick skinned dangerous game. The cartridge is billed as the most powerful commercial sporting rifle cartridge available.
The .460 Weatherby Magnum like the rest of the Weatherby line of cartridges is capable of launching a bullet at velocities much higher than its competition, and in doing so it generates higher levels of energy. The .460 Weatherby attempts to provide the ultimate level of insurance against dangerous game. Few cartridges come close to offering the hunter the level of performance offered by the Weatherby Magnum.
The .460 Weatherby Magnum is the world's most powerful commercially available sporting cartridge. The .460 will launch a 500 gr bullet at a chronographed velocity of 2700 ft/s (823 m/s) from a 26 inches (66 cm) barrel, measuring 8100 ft·lbf (10,982.1 J) of muzzle energy. Prior to the arrival of the .460 Weatherby Magnum on the hunting scene, the .600 Nitro Express
.600 Nitro Express
The .600 Nitro Express is a round in the Nitro Express series which was introduced in 1903. It is the second largest calibre in the Nitro Express line, exceeded only by Holland & Holland's .700 Nitro Express round.-Overview:...
had been considered to be the most powerful cartridge in terms of energy.
Cartridge History
Roy WeatherbyRoy Weatherby
Roy E. Weatherby was the founder and owner of Weatherby, Inc., an American rifle, shotgun and cartridge manufacturing company set up in 1945. Weatherby created an entire line of custom cartridges, and was one of the people responsible for the industry interest in high-speed cartridges...
had expected that the .378 Weatherby Magnum to make some head way in the African Continent but believed that his cartridge was being bypassed for low velocity, big bore cartridges by professional hunters who he felt were resistant to change. Furthermore, new regulations prohibiting the hunting of heavy, thick skinned, dangerous game with sub .40 caliber (10.16 mm) cartridges were being enacted in some African countries. These regulations would essentially ban the use of all previous Weatherby cartridges for the hunting of elephant, African Cape buffalo and rhinoceros.
In response to these factors, Roy Weatherby believed that it was necessary to provide hunters a Weatherby cartridge that could be used to hunt African dangerous game in the countries which had legislated against hunting with sub .40 caliber (10.16 mm) rifles. He accomplished this by necking up the .378 Weatherby Magnum case to accept a .458 caliber bullet. He named the new cartridge the .460 Weatherby Magnum. The first rifles for the .460 Weatherby Magnum were built on Brevex Magnum Mauser action.
However, Roy Weatherby was not the first cartridge designer to neck up the .378 Weatherby Magnum to .45 Caliber (11.6 mm). That distinction belongs to John Bushmiller, a gunsmith and hunter from Montana. Bushmiller named his cartridge the .45 Weatherby. He had success with the cartridge in Africa shooting Cape buffalo and rogue elephants in 1956, a year before Roy Weatherby began work on his own .45 caliber (11.43 mm) cartridge.
Norma Precision of Sweden was the first and only manufacturer of .460 Weatherby Magnum cases and ammunition which carried the Weatherby name and has done so under contract from Weatherby. During Weatherby’s partnership with J.P. Sauer/Dynamite-Nobel, production at Norma ceased and shifted to RWS, a wholly owned subsidiary of Dynamite-Nobel. However, RWS did not tool up in time to produce the .460 Weatherby Magnum cartridge and in the end only produced substandard .300 Weatherby ammunition before production once again moved to Norma.
DuPont at one time shipped DuPont No. 4350 powder to Norma Projektilfabrik for the reloading of Weatherby Ammunition. But some time later Norma was able to source a powder with similar burn characteristics locally which was used instead of DuPont's IMR 4350. Norma would later purchase the company and rename the powder Norma 204.
Design & Specifications
The .460 Weatherby Magnum is no longer considered a proprietary cartridge as the Sporting Arms and Ammunition Manufacturers' InstituteSporting Arms and Ammunition Manufacturers' Institute
The Sporting Arms and Ammunition Manufacturers' Institute is an association of American firearms and ammunition manufacturers...
(SAAMI) established voluntary specifications for the cartridge in January 1994. The Commission Internationale Permanente pour l'Epreuve des Armes à Feu Portatives
Commission Internationale Permanente pour l'Epreuve des Armes à Feu Portatives
The Commission Internationale Permanente pour l'Epreuve des Armes à Feu Portatives is an international organisation whose members are 14 states, mainly European....
(CIP) has also provided specifications for the cartridge to which all member states must comply when exporting, importing or manufacturing ammunition.
Cartridge Design
The .460 Weatherby Magnum case uses a necked up .378 Weatherby Magnum case. Although the .378 Weatherby Magnum case was inspired by the .416 Rigby case, it is considered a unique case which has gone on to serve as the parent cartridge of several high performance cartridges. The .460 Weatherby Magnum requires a case with the large propellant capacity necessary to propel a 500 gr bullet at 2700 ft/s (823 m/s). To accomplish this design goal, the cartridge case has a capacity able to hold 141.1 gr. of water (9.17 cm3). Frequently the powder charges for the .460 Weatherby Magnum can weight well in excess of 120 gr; in comparison a powder charge for the .458 Winchester Magnum rarely weighs over 80 gr.The .460 Weatherby Magnum is designed to headspace on its belt. The close chamber tolerance of Weatherby rifles indicate that these rifles do indeed headspace on the belt rather than the shoulder, unlike most modern belted cartridges which headspace on the shoulder regardless of the belt; the few exceptions being the .375 H&H Magnum and the .300 H&H Magnum. SAAMI recommended chamber dimensional tolerance range does allow for the headspacing to take place on the shoulder if need be.
Cartridge Dimensions and Specifications
- SAAMI compliant .460 Weatherby Magnum cartridge schematic: All dimensions in inches [millimeters].
Diagram reflects SAAMI
Sporting Arms and Ammunition Manufacturers' Institute
The Sporting Arms and Ammunition Manufacturers' Institute is an association of American firearms and ammunition manufacturers...
dimensions for the .460 Weatherby Magnum. CIP dimensions for the r1 (inside shoulder radius), r2 (outside shoulder radius), L1 (height from base to shoulder), L2 (height from base to neck), S (shoulder angle intercepts the center line) and the α dimensional value (shoulder angle) conflict with SAAMI dimensions. This is due to how the L1 and L2 values are defined in relation to the centers of the r1 and r2 dimensional values by CIP. The following table provides the conflicting values provided by SAAMI and CIP.
| Dimension / Specification | CIP Dimension Index | SAAMI Value | CIP Value |
| Body to shoulder radius | 0.13 in (3.3 mm) | 3.3 mm (0.12992125984252 in) | |
| Neck to shoulder radius | 0.1848 in (4.7 mm) | 4.72 mm (0.185826771653543 in) | |
| Base to shoulder length | 2.345 in (59.6 mm) | 60.39 mm (2.4 in) | |
| Base to neck length | 2.494 in (63.3 mm) | 62.17 mm (2.4 in) | |
| Angle between shoulder | Does not provide | 56°15'56" | |
| Length to shoulder vertex | Does not provide | 73.71 mm (2.9 in) | |
| Pressure | 65000 psi (4,481.6 bar) | 4400 bar (63,816.6 psi) |
Like all Weatherby Cartridges, the .460 Weatherby Magnum cartridge has a double radius shoulder where the body and the neck are connected with a continuously curving shoulder; the curve of which reverses at the point of tangency. SAAMI defines the length to the shoulder as the demarcation point where the bottom of inside curvature radius (corresponding roughly to CIP's r1) of the shoulder begins and the length to the neck as where the outside curvature radius (approximating CIP's r2) meets the neck. However, CIP does not define the location of the centers of the r1 and r2 whereas SAAMI provides this as being in inline with the length to the shoulder (inside radius) and length to neck (outside radius). This is due to the CIP treatment of r1 and r2 values as fillet radii as they do with many other cartridges.
Chamber Dimensions and Specifications
- SAAMI compliant .460 Weatherby Magnum chamber schematic: All dimensions in inches [millimeters].
SAAMI recommends a maximum chamber pressure rating of 65000 psi (4,481.6 bar) while CIP provides a maximum chamber pressure rating of 4400 bar (63,816.6 psi).
Weatherby no longer provides a long leade (freebore) for the cartridge. Currently Weatherby provides 0.756 inches (1.9 cm) of freebore for the .460 Weatherby in the Weatherby Mark V rifle. CIP recommends that rifling commence at 0.975 in (24.8 mm) from the case mouth reflecting the longer leade provided by Weatherby in the early 1960s. SAAMI recommends the present leade provided by Weatherby of 0.756 inches (1.9 cm).
Twist rate is given as 1 in 16 by Weatherby which would stabilize bullets up to 600 gr and mono-metal bullets. Weatherby provides a 6 grove contour #4 barrel for the .460 Weatherby Magnum. Ø land is given at 0.45 in (11.4 mm) and Ø groove is 0.458 in (11.6 mm). The recommended land arc width by both SAAMI and CIP is 0.175 in (4.4 mm).
Performance
This cartridge is very accurate despite its size. Weatherby guarantees a 1.5 MOA (44mm/100m) accuracy for this cartridge in a Weatherby rifle. Typically a full metal jacketedFull metal jacket bullet
A full metal jacket is a bullet consisting of a soft core encased in a shell of harder metal, such as gilding metal, cupronickel or less commonly a steel alloy. This shell can extend around all of the bullet, or often just the front and sides with the rear left as exposed lead...
or monolithic solid type bullet will penetrate more than 40 in (1 m) when impacting a dangerous game animal such as the Cape Buffalo or African Elephant. The .460 Weatherby Magnum has few peers for stopping dangerous African game.
Compared to its contemporaries, the 460 Weatherby Magnum has more energy at 150 yards than the .458 Winchester Magnum does at the muzzle and at a 100 yards more energy than the .458 Lott with factory ammunition. The .460 Weatherby Magnum provides a significant step up in performance over other production .458 caliber (11.6 mm) cartridges. The increased performance is realized in terms of both remaining energy and extended range.
| Cartridge | Criteria | Muzzle | 50 yards (45.7 m) | 100 yards (91.4 m) | 150 yards (137.2 m) | 200 yards (182.9 m) | 250 yards (228.6 m) | 300 yards (274.3 m) |
| .458 Winchester Magnum .458 Winchester Magnum The .458 Winchester Magnum is a belted, straight-taper cased, dangerous game rifle cartridge. It was introduced commercially in 1956 by Winchester and first chambered in the Winchester Model 70 African rifle. It was designed to compete against the .450 Nitro Express and the .470 Nitro Express... Hornady 500 gr DGS |
Velocity | 2140 ft/s (652.3 m/s) | 2007 ft/s (611.7 m/s) | 1879 ft/s (572.7 m/s) | 1757 ft/s (535.5 m/s) | 1641 ft/s (500.2 m/s) | 1531 ft/s (466.6 m/s) | 1429 ft/s (435.6 m/s) |
| Energy | 5084 ft·lbf (6,893 J) | 4472 ft·lbf (6,063.2 J) | 3921 ft·lbf (5,316.2 J) | 3428 ft·lbf (4,647.7 J) | 2990 ft·lbf (4,053.9 J) | 2603 ft·lbf (3,529.2 J) | 2267 ft·lbf (3,073.6 J) | |
| .458 Lott .458 Lott The .458 Lott is a .458 caliber belted hunting cartridge designed as a replacement for the less powerful .458 Winchester Magnum. It is based on the full length .375 H&H Magnum blown out and shortened to... Hornady 500 gr DGS |
Velocity | 2300 ft/s (701 m/s) | 2162 ft/s (659 m/s) | 2029 ft/s (618.4 m/s) | 1900 ft/s (579.1 m/s) | 1777 ft/s (541.6 m/s) | 1660 ft/s (506 m/s) | 1549 ft/s (472.1 m/s) |
| Energy | 5873 ft·lbf (7,962.7 J) | 5190 ft·lbf (7,036.7 J) | 4568 ft·lbf (6,193.4 J) | 4007 ft·lbf (5,432.8 J) | 3505 ft·lbf (4,752.1 J) | 3058 ft·lbf (4,146.1 J) | 2663 ft·lbf (3,610.5 J) | |
| .460 Weatherby Magnum Hornady 500 gr DGS | Velocity | 2600 ft/s (792.5 m/s) | 2452 ft/s (747.4 m/s) | 2309 ft/s (703.8 m/s) | 2171 ft/s (661.7 m/s) | 2037 ft/s (620.9 m/s) | 1908 ft/s (581.6 m/s) | 1784 ft/s (543.8 m/s) |
| Energy | 7505 ft·lbf (10,175.4 J) | 6673 ft·lbf (9,047.4 J) | 5917 ft·lbf (8,022.4 J) | 5230 ft·lbf (7,090.9 J) | 4605 ft·lbf (6,243.5 J) | 4040 ft·lbf (5,477.5 J) | 3535 ft·lbf (4,792.8 J) | |
| Values courtesy of the Hornady Ballistic Calculator | ||||||||
The .460 Weatherby Magnum like the .375 H&H Magnum is a relatively flat shooting cartridge. The maximum point blank range
Point-blank range
In external ballistics, point-blank range is the distance between a firearm and a target of a given size such that the bullet in flight is expected to strike the target without adjusting the elevation of the firearm. The point-blank range will vary with the firearm and its particular ballistic...
(MPBR) for the 450 gr Weatherby load is 258 yards (235.9 m). The 500 gr Weatherby factory ammunition has a maximum point blank range of 245 yards (224 m). These trajectories compare well with those of the .375 H&H Magnum
.375 H&H Magnum
The .375 Holland & Holland Magnum is a powerful rifle round and one of the best-known and most popular medium-bore cartridges in the world. The .375 H&H was only the second cartridge ever to feature a belt, now common among magnum rounds. A popular misconception is that the belt is for headspace,...
. At 200 yd (182.9 m) Hornady's Interlock .375 H&H Magnum's 270 gr bullet drops 11.3 in (28.7 cm) while Hornady's DGX 300 gr bullet drops 13.8 in (35.1 cm). In contrast the .460 Weatherby Magnum's 450 gr (B460450TSX) drops 12.3 in (31.2 cm) and the 500 gr (H460500FJ) drops 12.7 in (32.3 cm). The .460 Weatherby Magnum, however, averages over 75% greater energy than the .375 H7H Magnum.
Compared to the more popular .458 Winchester Magnum and the .458 Lott, the .460 Weatherby Magnum provides a flatter trajectory, dropping less than 10 inches (25.4 cm) at 300 yards (274.3 m) when sighted in at 200 yards (182.9 m) with the 450 gr. Barnes TSX Weatherby ammunition. With the 500 gr FMJ or RN Weatherby ammunition bullet drop is 11 inches (27.9 cm) at the same range. The .458 Winchester Magnum and the .458 Lott have a 206 yards (188.4 m) and 220 yards (201.2 m) MPBR respectively in comparison. The 500 gr FMJ or RN Weatherby ammunition shoot to the same point of impact, which is necessary in a dangerous game cartridge as hunters may need to switch from solids to soft round nose rounds depending on the circumstances and game being hunted. This is due to Weatherby's (Norma) factory loaded ammunition using Hornady's DGS and DGX bullets which have identical G1 ballistic coefficients of .295.
The ability of the .460 Weatherby to carry the energy and velocity required to take heavy, tough skinned dangerous game combined with the flatter trajectories it provides, gives the shooter the ability to take game species at longer ranges than its competition. The stand-off ability assures a greater margin of safety when hunting dangerous game species as the hunter need not get as close to the game as with other cartridges. Furthermore, this lessens the need to compensate for bullet drop and target size. However, for practical reasons, most dangerous game are shot at close ranges of less than 60 yd (54.9 m).
Bullets available for the .460 Weatherby Magnum range from 300 gr. Velocities with these bullets vary from 2500 feet per second (762 m/s) with the 600 gr bullet to 3100 feet per second (944.9 m/s) with the 300 gr bullet. The good sectional density and ballistic coefficients of these bullets, particularly spitzer bullets available, give the cartridge the ability to conserve velocity in flight and provide deep penetration on game. The wide range of bullet weights available and the ability tailor the performance the .460 Weatherby Magnum gives the cartridge a performance envelope unmatched by most cartridges. The combination of velocity and bullets of very good sectional density contributes to the .460 Weatherby Magnum's excellent penetration on game provided the toughest bullets are employed for the task.
As with other most other cartridges, the Weatherby’s performance with mono-metal bullets is slightly poorer than with conventional bullets. Mono-metal bullets tend to be longer for a given bullet weight than conventional lead core bullets. For this reason, the mono-metal bullets similar to the Barnes TSX may have to be seated more deeply into the case displacing volume which could be filled with the propellant. A loss of velocity of 50–100 ft/s (15.2–30.5 m/s) can be expected with these mono-metal bullets. Likewise bullets which have a higher specific gravity than lead, such as the tungsten core Speer African Grand Slam solids being shorter than conventional FMJ bullets will allow for more powder capacity and therefore a higher velocity.
The performance level of the Weatherby cartridge comes at a cost: recoil. The recoil of the .460 Weatherby Magnum is severe. The cartridge generates close to 100 ft·lbf (135.6 J) of energy. This is in keeping with Newton's inescapable Third Law of Motion: Every action has an equal and opposite reaction. As performance levels rise, so does the recoil. Put into perspective the recoil of the .460 Weatherby is 120% greater than the .375 H&H Magnum, 50% greater than the .458 Winchester Magnum and 20% greater than the .458 Lott.
The .460 Weatherby Magnum compares well with the classic English big bore cartridges; it exceeds all these cartridges in velocity, energy, trajectory and penetration. Cartridges such as the .500 Jeffery
.500 Jeffery
The .500 Jeffery is a caliber of rifles that first appeared around 1920, and was originally introduced by the August Schuler Company, a German firm, under the European designation "12,7x70 mm Schuler" or ".500 Schuler"...
, .500 Nitro Express
.500 Nitro Express
The .500 Nitro Express is a .510 caliber big bore hunting cartridge. It was designed for use in single shot and double rifles. The cartridge is available in two lengths: a and a version...
, .505 Gibbs, .577 Nitro Express
.577 Nitro Express
The .577 Nitro Express is a rimmed cartridge in the Nitro Express series of big-game hunting ammunition. It is also known as the .577 Nitro Express 3" and there is a variant called the .577 Nitro Express 2.75"...
, .600 Nitro Express
.600 Nitro Express
The .600 Nitro Express is a round in the Nitro Express series which was introduced in 1903. It is the second largest calibre in the Nitro Express line, exceeded only by Holland & Holland's .700 Nitro Express round.-Overview:...
do however provide a larger diameter bullet while the latter two cartridges are also capable of launching heavier bullets than the .460 Weatherby Magnum. At present only the modern classic .700 Nitro Express
.700 Nitro Express
The .700 Nitro Express is a big game rifle cartridge made by Holland & Holland, London, England. It was developed in 1988 by Jim Bell and William Feldstein and built by H&H. Feldstein had tried unsuccessfully to get H&H to build a .600 Nitro Express for him, but they had already ceased production...
, which is barely a production cartridge, exceeds the performance of the .460 Weatherby and then in only a single category: energy. Cartridges such as the .475 A&M Magnum, .500 A-Square, and the .550 Magnum which are based on the .460 Weatherby Magnum can exceed the performance of the parent cartridge, however, these are considered wildcat and proprietary cartridges.
Sporting Usage
As a hunting cartridge, the .460 Weatherby Magnum has a very limited role. While it is capable of taking any species of game animal, it is too powerful for most game species. As a hunting cartridge, due to its power, energy and penetration, the .460 Weatherby Magnum has a very limited sporting niche. The .460 Weatherby Magnum is primarily a thick skinned dangerous game cartridge. It is designed to provide the ultimate in stopping power against African elephant, African buffaloAfrican Buffalo
The African buffalo, affalo, nyati, Mbogo or Cape buffalo is a large African bovine. It is not closely related to the slightly larger wild Asian water buffalo, but its ancestry remains unclear...
, hippopotamus
Hippopotamus
The hippopotamus , or hippo, from the ancient Greek for "river horse" , is a large, mostly herbivorous mammal in sub-Saharan Africa, and one of only two extant species in the family Hippopotamidae After the elephant and rhinoceros, the hippopotamus is the third largest land mammal and the heaviest...
and the rhinoceros
Rhinoceros
Rhinoceros , also known as rhino, is a group of five extant species of odd-toed ungulates in the family Rhinocerotidae. Two of these species are native to Africa and three to southern Asia....
. The .460 Weatherby Magnum when loaded to its full potential has little use outside its primary design purpose. Although the cartridge is can be used to hunt any species of game, there are far better cartridge choices which offer a greater flexibility of use when hunting big game animals.
It has more than the required energy necessary to drive 450 – bullets into the elephant's vital organs from any angle provided that the bullet is up to the task. Generally, elephants require solid bullets especially if one is contemplating shooting it in the brain. Monolithic bullets such as the A-Square Monolithic Solid, Barnes Banded Solid, Supreme Nosler Solid and more conventional tougher FMJ bullets such as the Hornady DGS are good choices as they are able to withstand stresses placed on the bullets by the velocity of the .460 Weatherby Magnum. At the 250 yd (228.6 m) mark, the .460 Weatherby has enough remaining energy and velocity to make quick kills on elephant. At this range its impact energy is comparable to that of the .458 Winchester Magnum at 65 yd (59.4 m) However, as elephant hunting is usually a close range affair where 90% of the shooting situations fall within 60 yd (54.9 m) the fact that the .460 Weatherby can fell an elephant at long ranges is mostly an academic argument at best.
Bullets in the 400 gr range are excellent for African cape buffalo and rhinoceros. A combination of solids and expanding bullets may be used against these big game. Expanding bullets should be of the controlled expansion variety. Rapidly expanding bullets are to be avoided. A-Square Dead Tough, Barnes TSX, Hornady DGX and similar toughly constructed expanding bullets are recommended. As with the solid bullets, expanding bullets for the cartridge should be rated to perform well at .460 Weatherby velocities.
The .460 Weatherby is overly powerful for lion or leopard. Lion are thin skinned and weigh no more than 600 lb (272.2 kg) while leopards weigh no more than 250 lb (113.4 kg). When the .460 Weatherby is used for hunting leopard or lion, a rapidly expanding bullet is normally used. Bullets ideal for lion or leopard begin with the 300 gr bullets. A-Square's Lion Load, a fragmenting 465 or soft point is one such load appropriate for the big cats. Apart from the A-Square Lion Load bullets ranging in weight from 300 gr are better used on lion and leopard. Since the .460 Weatherby can drive these bullets at over 3000 ft/s (914.4 m/s), and the large felidae are susceptible to hydrostatic shock, these lighter weight bullets in relation to the caliber may provide the best option if the .460 is chosen for the big cats. However, as no mainstream ammunition manufacturer loads these bullets, tailoring such loads for lion or leopard is strictly an option available only to the handloader or for those willing to have custom ammunition made to order.
The capability of the .460 Weatherby Magnum to hold flatter trajectories with appropriate bullets provides the cartridge the ability to take African plains game at distances beyond 250 yards (228.6 m) with no holdover adds to the versatility of .460 Weatherby Magnum as an all round African cartridge. However, while the .460 Weatherby has the capacity to take such game species, there can be little doubt of the fact that there are more suitable cartridge choices for these species with far less recoil than the .460 Weatherby Magnum.
The .460 Weatherby is one of the very few rifle cartridges approved by the International Whaling Commission
International Whaling Commission
The International Whaling Commission is an international body set up by the terms of the International Convention for the Regulation of Whaling , which was signed in Washington, D.C...
for the harvesting of whales. The cartridge was deemed to have the penetration necessary to penetrate to the brain stem to provide a quick kill on whales. The Makah people of the Pacific Northwest
Pacific Northwest
The Pacific Northwest is a region in northwestern North America, bounded by the Pacific Ocean to the west and, loosely, by the Rocky Mountains on the east. Definitions of the region vary and there is no commonly agreed upon boundary, even among Pacific Northwesterners. A common concept of the...
have used this rifle cartridge for decades hunting whales.
While the .460 Weatherby Magnum is powerful cartridge, it cannot make up for inexperience or poor marksmanship. As with any rifle cartridge that produces heavy recoil, recovery time between subsequent shots should be taken into account when choosing such cartridges for hunting dangerous game.
North American big game does not require the full power of the .460 Weatherby Magnum. Harvesting of bison
Bison
Members of the genus Bison are large, even-toed ungulates within the subfamily Bovinae. Two extant and four extinct species are recognized...
, elk
Elk
The Elk is the large deer, also called Cervus canadensis or wapiti, of North America and eastern Asia.Elk may also refer to:Other antlered mammals:...
, moose
Moose
The moose or Eurasian elk is the largest extant species in the deer family. Moose are distinguished by the palmate antlers of the males; other members of the family have antlers with a dendritic configuration...
and brown bear
Brown Bear
The brown bear is a large bear distributed across much of northern Eurasia and North America. It can weigh from and its largest subspecies, the Kodiak Bear, rivals the polar bear as the largest member of the bear family and as the largest land-based predator.There are several recognized...
can be accomplished by reducing the performance of the cartridge to match the requirements. The .460 Weatherby Magnum cartridge has the flexibility to be loaded to duplicate the performance of the .45-70 Government to the .450 Rigby
.450 Rigby
The .450 Rigby Magnum Rimless better known simply as the .450 Rigby is a .45 caliber rimless, bottlenecked cartridge intended for the hunting of heavy dangerous game. The cartridge is based on the .416 Rigby necked up to accept a bullet. The cartridge is intended for use in magazine rifles...
. An advantage is the significantly lower recoil of such loadings.
Rifles & Ammunition
Due to the recoil energy and recoil velocity of the cartridge rifles designed for the .460 Weatherby Magnum and other cartridges in its class demand particular attention with regard to their design. Most modern rifles designed for cartridges of this class incorporate design features that reduce the felt recoil to the shooter and provide a durable shooting platform. Rifles chambered for the .460 Weatherby Magnum require close mating of metal to stock. This can be accomplished by properly bedding the action to the stock. Recoil lugs and crossbolts serve the purpose of preventing a movement differential between the action and the stock which could lead to further loosening between the action and the stock or splitting the stock. Proper bedding and properly installed recoil lugs and crossbolts can go a long way in preserving the integrity of the firearm chambered in cartridges such as the .460 Weatherby Magnum as functional implements.The Weatherby Mark V is the most popular rifle chambered for the .460 Weatherby Magnum cartridge. The rifle stock is engineered to minimize the felt recoil of heavy recoiling cartridges. The California Style Monte Carlo stock’s slanting comb will under recoil push away from the shooter’s face. The rifle stock is also designed with a generous cast off to help tame the heavy recoil of the .460 Weatherby Magnum. The rifle uses an aluminum bedding block and recoil lugs to prevent any movement between the stock and the action. At a point of time the .460 Weatherby Magnum was offered for sale as an over the counter item in a few Mark V rifle lines, however, at present it is only available in the Mark V Deluxe. The Weatherby Custom Shop does offer the rifle in a few lines such as the Crown Custom, Dangerous Game Rifle (DGR) and the Safari Custom. All the over the counter and custom shop rifles are built on the Mark V action which is regarded by many as one of the strongest rifle actions available. The first .460 Weatherby’s were built on Magnum Mauser actions but these were found wanting due to the higher pressures generated by Weatherby cartridges. The Mark V action is able to contain 200000 psi (13,789.5 bar) pressure.
A-Square currently offers rifles chambered .460 Weatherby Magnum in the Hannibal (right handed) and Caesar (left handed) lines. The rifles are based on the Enfield P14 design and like the Weatherby’s are designed to minimize felt recoil. The rifles are ruggedly build to perform well with hard recoiling cartridges such as the .460 Weatherby Magnum, .500 A-Square, .577 Tyrannosaur. Dumoulin Herstal of Belgium manufactures rifles for the cartridge in their proprietary A2000/LM Long Magnum Mauser action White Hunter rifle line. The Dumoulin White Hunter is also available in .416 Rigby, .500 Jeffery and 505 Gibbs. Apart from these companies, several custom rifle maker such as Ballard Arms and Empire Rifles provide custom rifles in this chambering.
Weatherby ammunition is billed as Ultra Velocity Ammunition by Weatherby. Typically, Weatherby cartridges exhibit velocities greater than 200–300 ft/s (61–91.4 m/s) over the more popular similar caliber cartridges. Early Weatherby ammunition was loaded to near maximum pressures. Since then, however, Weatherby has backed off from these pressures. The resulting factory ammunition is about 100 ft/s (30.5 m/s) slower than early Weatherby Ammunition.
| Ammunition | Bullet | Muzzle Velocity | Muzzle Energy | MPBR/Zero | Notes |
| Weatherby H460500FJ | Hornady 500 gr DGS | 2600 ft/s (792.5 m/s) | 7505 ft·lbf (10,175.4 J) | 245 yd (224 m)/209 yd (191.1 m) | Load used Hornady FMJ†, FMJ-IB† now DGS |
| Weatherby H460500RN | Hornady 500 gr DGX | 2600 ft/s (792.5 m/s) | 7505 ft·lbf (10,175.4 J) | 245 yd (224 m)/209 yd (191.1 m) | Load used Hornady RN†, RN-IB† now DGX |
| Weatherby B460450TSX | Barnes 450 gr TSX | 2660 ft/s (810.8 m/s) | 7072 ft·lbf (9,588.3 J) | 258 yd (235.9 m)/219 yd (200.3 m) | Currently in production |
| A-Square Triad | A-Square 500 gr MS, DT, LL | 2580 ft/s (786.4 m/s) | 7390 ft·lbf (10,019.5 J) | 251 yd (229.5 m)/213 yd (194.8 m) | Currently in production |
| Conley Precision | Barnes 350 gr TSX | 2950 ft/s (899.2 m/s) | 6762 ft·lbf (9,168 J) | 273 yd (249.6 m)/233 yd (213.1 m) | Currently in production |
| Conley Precision | Swift 400 gr A-Frame | 2780 ft/s (847.3 m/s) | 6863 ft·lbf (9,305 J) | 256 yd (234.1 m)/218 yd (199.3 m) | Currently in production |
| Conley Precision | Barnes 450 gr BS | 2700 ft/s (823 m/s) | 7283 ft·lbf (9,874.4 J) | 261 yd (238.7 m)/222 yd (203 m) | Currently in production |
| Conley Precision | Barnes 450 gr TSX | 2700 ft/s (823 m/s) | 7283 ft·lbf (9,874.4 J) | 262 yd (239.6 m)/222 yd (203 m) | Currently in production |
| Conley Precision | Swift 450 gr A-Frame | 2700 ft/s (823 m/s) | 7283 ft·lbf (9,874.4 J) | 257 yd (235 m)/219 yd (200.3 m) | Currently in production |
| Conley Precision | Barnes 500 gr BS | 2660 ft/s (810.8 m/s) | 7854 ft·lbf (10,648.6 J) | 260 yd (237.7 m)/221 yd (202.1 m) | Currently in production |
| Conley Precision | Barnes 500 gr TSX | 2660 ft/s (810.8 m/s) | 7854 ft·lbf (10,648.6 J) | 261 yd (238.7 m)/222 yd (203 m) | Currently in production |
| Conley Precision | Hornady 500 gr FMJ-RN | 2650 ft/s (807.7 m/s) | 7795 ft·lbf (10,568.6 J) | 250 yd (228.6 m)/213 yd (194.8 m) | Currently in production |
| Conley Precision | Hornady 500 gr IL-RN | 2650 ft/s (807.7 m/s) | 7795 ft·lbf (10,568.6 J) | 249 yd (227.7 m)/212 yd (193.9 m) | Currently in production |
| Conley Precision | Swift 500 gr A-Frame | 2650 ft/s (807.7 m/s) | 7795 ft·lbf (10,568.6 J) | 256 yd (234.1 m)/218 yd (199.3 m) | Currently in production |
| Values courtesy of the respective manufacturer. MPBR/Zero values courtesy of Big Game Info. Temperature: 59 °F (15 °C) Altitude: 500 ft (152.4 m) † Discontinued |
|||||
Currently ammunition is available from A-Square, Conley Precision Cartridge and Weatherby (Norma) among others. Factory ammunition is loaded with 350 gr to 600 gr bullets. Factory ammunition are relatively expensive costing between $6.00 and $8.50 per cartridge.
Accessories
Although, most elephant gunElephant gun
An elephant gun is a large caliber gun, rifled or otherwise, so named because they were originally developed for use by big-game hunters for elephants and other large dangerous game. They used black powder at first but then started using smokeless powder...
s are equipped with open sights the typical Weatherby Mark V rifle chambered for the .460 Weatherby Magnum does not come equipped with open sights. Instead they are drilled and tapped for scope mounts. The cartridge’s performance even at 200 yd (182.9 m) leaves enough energy necessary to bring down large dangerous thick skinned game. At these ranges, telescopic sights have a greater advantage than open sights. The stock itself is designed for with the intent of providing the shooter a higher line of sight which is consistent with the use of telescopic sights.
Weatherby Rifles such as the Dangerous Game Rifle and other Weatherby factory custom offerings are provided with open sights. Open sights tend to sight in quicker than scoped rifles and for this reason open sighted rifles are preferred by hunters for back-up work—when the hunter and/or guide must mount and discharge their firearm to ensure a charging game animal does not injure a client or to deliver a coup de grâce to a wounded game animal. It also has the added benefit of preventing the hunter from getting his eyebrow cut by the scope, which is not uncommon with a firearm with as much recoil as the .460 Weatherby Magnum.
The Recoil
Recoil
Recoil is the backward momentum of a gun when it is discharged. In technical terms, the recoil caused by the gun exactly balances the forward momentum of the projectile and exhaust gasses, according to Newton's third law...
of the .460 Weatherby Magnum presents a problem for many shooters when shooting a cartridge of this size. Even with a 12 lb (5.4 kg) rifle (scope, base, rings and cartridges included) the recoil against the shooter's shoulder is measured at 100 ft·lbf (135.6 J). Compare this to most rifles chambered in .30-06 Springfield
.30-06 Springfield
The .30-06 Springfield cartridge or 7.62×63mm in metric notation, was introduced to the United States Army in 1906 and standardized, and was in use until the 1960s and early 1970s. It replaced the .30-03, 6 mm Lee Navy, and .30 US Army...
which develop an average of 20 ft·lbf (27.1 J) of free recoil
Free recoil
This article is about the energy produced by small arms when discharged. For other uses, go to Recoil Free recoil is a vernacular term or jargon for recoil energy...
. Recently Weatherby has offered some reduced loads in the 7500 ft·lbf (10,168.6 J) range, in order to be more forgiving to shooters. The recoil of the full-power loads is very punishing and if the gun has a scope, scope cuts on the forehead are common. A factory powder charge for this cartridge is about 115 gr.
For many years the Weatherby Mark V rifles chambered in .460 Weatherby were equipped with a Pendleton muzzle brake
Muzzle brake
Muzzle brakes and recoil compensators are devices that are fitted to the muzzle of a firearm or cannon to redirect propellant gases with the effect of countering both recoil of the gun and unwanted rising of the barrel during rapid fire...
to help alleviate the effects of recoil. The Pendleton muzzle brake is a integral braking system installed by porting the rifle barrel and once cut into the barrel cannot be reversed. All current Weatherby Mark V rifles chambered for the .378 Weatherby Magnum and its derivatives are provided with the Accubrake as a standard accessory with the rifle package. The Accubrake reduces felt recoil by about 53%. Unlike the earlier Pendleton muzzle brake, the Accubrake is a removable, screw-on type brake. The use of muzzle brakes is frowned on by the hunting community in particularly in guided hunting situations involving dangerous game. The Accubrake being a removable accessory can be reserved for sighting in. According to Weatherby, the removal of the Accubrake will not change the point of impact.
Handloading
As factory loaded ammunition for the .460 Weatherby Magnum is optimized for only heavy dangerous game, the reloader will gain a great benefit from reloading for the .460 Weatherby Magnum. Reloading the .460 Weatherby Magnum is no more difficult than reloading any other belted magnum cartridges. The reloader has a wide variety of components, bullets and powders available. Tailoring a load to a certain performance level or for specific game is reason enough to reload the cartridge.
Among bullet manufacturers Barnes, Hornady and Lyman provide reloading data in their manuals for the .460 Weatherby Magnum. Powder manufacturers Accurate Arms, Hodgdon and Norma have also provide reloading data for the cartridge.
Bullets
The .460 Weatherby Magnum accepts 0.458 in (11.6 mm) bullets. There are a large variety of bullets manufactured which are suited for the .460 Weatherby. Bullets weighting between 250 gr are acceptable although the cartridge performs best with bullets weighting between 450 gr. Care must be taken with 250 gr bullets as many are optimized for use with the .45-70 Government cartridge. Such bullets are best used with reduced loads. All major bullet manufacturers produce bullets that can be used in the .460 Weatherby.| Manufacturer | Bullet |
| A-Square | 465 gr and 500 gr Triad (Monolithic, Dead Tough & Lion Load) bullets |
| Barnes | 250 gr TSX FN†; 300 gr TSX FN, TSX FB,SP & FNSP; 350 gr TSX FB; 400 gr SP & FNSP; 450 gr TSX FB & Solid; 500 gr TSX FB and Solid and 600 gr Original†. |
| Hornady | 300 gr HP; 350 gr RN &FP; 480 gr DGS & DGX; 500 gr RN-IB†, FMJ-RN†, DGS & DGX. |
| Nosler | 300 gr Partition; 500 gr PP Partition & Solid. |
| Speer | 350 gr SPFN†; 400 gr SPFN†; 500 gr AGS(SP)†, AGS-T†, TBBC† & TBSS†. |
| Swift | 400 gr A Frame; 450 gr A Frame; 500 gr A Frame. |
| Woodleigh | 400 gr PP-SN; 480 gr RN-SN & FMJ; 500 gr PP-SN, RN-SN & FMJ; 550 gr RN-SN & FMJ. |
| Values courtesy of the respective bullet manufacturer. † indicates discontinued bullet. |
|
In addition bullets there are several hard cast 0.458 in (11.6 mm) diameter bullets that are compatible with the .460 Weatherby Magnum. Such bullets, unlike jacketed bullets, are designed to be driven at reduced velocities. Driving these bullets at .460 Weatherby velocities can cause lead to be deposited in the barrel. Regular cast bullets are not recommended with the .460 Weatherby as the upper end of the permissible velocities for these cast bullets is lower than the lowest velocities obtainable from the .460 Weatherby Magnum.
Powders
The .460 Weatherby performed at its best with medium slow burning powders especially with heavier bullets. Usual powder charges start in excess of 100 gr. Due to the large capacity case, charges less than 90% load density are not usually recommended. Hangfires with cartridges such as the .460 Weatherby are extremely unpleasant. Powder charges with higher load densities provide more reliable burn performance than lighter charges.| Powder Brand | Lighter Bullets - 250 gr | Heavier Bullets - 400 gr | ||
| Accurate Arms | AA2520, AA2700 & AA4350 | AA2700, AA4350 & AA3100 | ||
| Alliant | RL-15 & RL-17 | RL-17 & RL-19 | ||
| Hodgdon | H380, H414, Varget, H4895 & H4350 | H4350 & H4831 | ||
| IMR | IMR 3031, IMR 4320, IMR 4064 & IMR 4350 | IMR 4350 & IMR 4831 | ||
| Norma | 203-B & 204 | 204 & MRP | ||
| VhitaVuori | N-140 & N-150 | N-150, N-160 & N-560 | ||
| Winchester | WW760 | WW760 | ||
| Powders choices from reloading manuals | ||||
For reduced velocity reloads powders such as Accurate Arms AA8700 and Hodgdon’s H870 have performed well. With AA8700 and H870 there will remain a large quantity of un-burnt powder which can be annoying. Faster powders, if used, will occupy less volume; so a filler such as Dacron is used to hold the powder charge against the primer to provide shot to shot consistence and reliable ignition.
Cases
At present there is one single manufacturer of .460 Weatherby Magnum brass: Norma Precision. Norma Precision manufactured brass is headstamped as Weatherby (as opposed to Norma) as they are under contract by Weatherby to manufacture Weatherby Ammunition. Weatherby brass is available from Weatherby. Suggested retail value a box containing 20 cases is US $82.00 although most retail outlets offer the component brass for a lower retail price.Primers
When Roy Weatherby began working with the .378 Weatherby Magnum, the parent cartridge of the .460 Weatherby Magnum, he found that the primers of the day to be unreliable. Roy Weatherby contacted Charlie Horn, the founder of the Federal Cartridge Company and explained his problem. Mr. Horn's reply was "We'll make you a primer that, by God, will set your powder ablaze". The Federal 215 primer was developed for the .378 Weatherby Magnum cartridge and is the only primer which is generally recommended for use with the .460 Weatherby Magnum cartridge. This primer was created specifically to provide reliable ignition for compressed powder charges in large capacity cases. All reloading manuals provide loading data using only this particular primer to develop reloading data for the .460 Weatherby Magnum.In a pinch the Winchester WLRM primer or primers with similar brisance may be substituted. The Federal 216 primer is not available for sale to the reloader at present but should the primer become available it may be substituted for the Federal 215 primer. This primer was developed for the .470 Nitro Express and is currently used by Federal to load the cartridge.
Dies
Full length and neck sizing dies are available from RCBS and Redding. A full length die set is available from Hornady Manufacturing. Most two-die set includes a bullet seating die and either a full length resizing die or a neck sizing die. A full length sizing die reforms the complete body of the case to specification. The neck sizing die reforms only the neck so that it can hold the bullet in place. Neck-sizing cases rather than full length sizing cases can extend the case life of cartridges. On the downside, cases that are only neck sized may not feed through some actions reliably especially when used in semi-automatic rifles. Cartridges which are intended for semi-automatics should be full length resized. Most Weatherby manufactured rifle chambers are machined to very tight tolerances making full length resizing has little effect on extending the case life as the cartridge brass does not have to be worked as much to reform it. If once fired cases are to be used in a rifle in other than one it which it had been previously fired full length resizing the cases is the norm.Criticism
On paper the 460 Weatherby Magnum has better penetration than most other rifle cartridges including the .577 Tyrannosaur.577 Tyrannosaur
The .577 Tyrannosaur or .577 T-rex is a type of cartridge developed by A-Square in 1993 for big game hunting in Africa. The .577 contains a diameter Monolithic Solid Projectile which when fired moves at producing of muzzle energy. The production model from A-square is based on their Hannibal...
, .585 Nyati
.585 Nyati
The .585 Nyati is a shoulder-fired rifle cartridge. Nyati means Cape Buffalo in many African languages such as Swahili. The .585 Nyati can generate of muzzle energy. This places it at or near the top of the list for most powerful cartridges that can be chambered in a rifle that can still be...
, .600 Overkill
.600 Overkill
The .600 Overkill cartridge is a hunting cartridge designed to fit the CZ-550 action, by American Hunting Rifles.-Design:The .600 Overkill was designed by Robert Garnick of Las Vegas, Nevada, USA...
and all Nitro Express
Nitro Express
The Nitro Express series of cartridges are used in large-bore hunting rifles, also known as elephant guns or express rifles. They are named after the propellant they use, cordite, which is composed of nitrocellulose and nitroglycerine...
line of cartridges. However, the 460 Weatherby Magnum was beset by penetration issues from the beginning. Safari hunters had reported variously that the 500 gr round nose bullets fragmenting and that the solids deforming and core separation which lead to poor terminal performance on heavily boned animals. In such cases, the energy of the bullet is expended through the work performed deforming or disintegrating the bullet rather than directed towards the more productive penetration which is the sole reason for the use of these solid bullets.
Early Norma
Norma (company)
Norma Precision is a Swedish manufacturer of ammunition located in Åmotfors, in the province of Värmland, just 20 km of the Norwegian border. It is commonly referred to as simply Norma.- History :...
factory ammunition loaded for Weatherby used Hornady
Hornady
Hornady Manufacturing Company is an American manufacturer of ammunition and handloading components, based in Grand Island, Nebraska.The company was founded by Joyce Hornady in 1949 and is currently run by his son Steve Hornady who took over after his father's death in a plane crash in 1981.Hornady...
500 gr RN and FMJ. Norma had been loading these bullets to a velocity of 2700 ft/s (823 m/s). Norma dropped the velocity of the cartridge to 2650 ft/s (807.7 m/s) while Hornady introduced the mechanically locked-in lead core InterLock bullets in 1980 to improve the terminal ballistics of their bullets. Subsequently, Hornady introduced the 500 gr InterBond FMJ (IB-FMJ) and RN (IB-RN) bullets which featured a brass jacket with a welded lead core. The IB-FMJ and IB were loaded by Norma for the Weatherby cartridge. These Hornady .458 caliber round nose and solid bullets were later found to have a performance envelop of not exceeding 2300 ft/s (701 m/s) in the .458 caliber.
Hornady has since developed the copper clad steel encased bonded core DGX and DGS bullets rated for a velocity of 2600 ft/s (792.5 m/s). The new Hornady DGX and DGS bullets are now being loaded by Norma at the reduced velocity of 2600 ft/s (792.5 m/s) to coincide with the velocity rating of the tougher DGS and DGS 500 gr bullets. Hornday's performance envelop for the .458 caliber 500 gr DGX and DGS bullets are between 2600 ft/s (792.5 m/s) and 1600 ft/s (487.7 m/s) the same rating they had assigned earlier to the more lightly constructed InterLock bullet.
While poor penetration due to bullet construction was not limited to the .460 Weatherby Magnum, the issue was more magnified in the this cartridge than others due to the additional stress imposed on the bullet by the higher velocity of the cartridge as is the case with the .375 H&H Magnum cartridge firing the 300 gr solids at 2530 ft/s (771.1 m/s). Using premium, stoutly constructed premium solid bullets similar to the Barnes Banded Solid, Hornady DGS, Nosler Solid, Speer African Grand Slam Solid and others have resolved this problem.
Parent Cartridge
The large capacity the availability of cases makes .460 Weatherby Magnum a likely candidate for various forms of conversion and experimentation. The .460 Weatherby Magnum has served as the immediate parent cartridge of several proprietary and wildcat cartridge. It is, however, also correct to list the .378 Weatherby Magnum as the parent cartridge for these cartridges as the .460 Weatherby Magnum itself was based on the .378 Weatherby Magnum case.The following are some of the better known cartridges based on the .460 Weatherby where the .460 acted as the direct parent cartridge:
.460 A-Square Short
- The cartridge is a proprietary cartridge designed by Arthur Alphin of A-Square. This .458 caliber (11.6 mm) cartridge is based on a shortened .460 Weatherby Magnum case which can be used in a standard length action rifle. The cartridge is capable of developing 6670 ft·lbf (9,043.3 J) when firing a 500 gr bullet at 2450 ft/s (746.8 m/s).
.465 H&H Magnum
- The cartridge was designed by Russell Wilkins and Holland & Holland and released in 2003. The cartridge is capable of firing a .46 caliber (11.7 mm) 480 gr bullet at 2385 ft/s (726.9 m/s). This cartridge is designed to work at moderate pressures.
.475 A&M Magnum
- The .475 A&M Magnum is a .47 caliber (12 mm) wildcat cartridge designed by the Atkinson & Marquart Rifle Company of Prescott AZ. It is based on the .460 Weatherby Magnum necked up to accept a 0.475 in (12.1 mm) diameter bullet. The .475 A&M Magnum is capable of launching a 500 gr at 2980 ft/s (908.3 m/s) for 9860 ft·lbf (13,368.4 J) energy.
.500 Whisper
- The .500 Whisper was disigned by J.D. Jones of SSK Industries. It is based on a shortened .460 Weatherby Magnum case which is then necked up to accept a 0.51 in (13 mm) VLD bullet. It is capable of firing a 750 gr at 1050 ft/s (320 m/s).
.50 Peacekeeper
- This cartridge is another one of J.D. Jones' designs. It is essentially a .460 Weatherby Magnum necked up to accept a 750 gr, 0.51 in (13 mm) diameter VLD bullet which it is capable of firing at 2205 ft/s (672.1 m/s) for 8100 ft·lbf (10,982.1 J) energy.
.500 A-Square
- The .500 A-Square is another proprietary cartridge designed by Arthur Alphin of A-Square based on the .460 Weatherby Magnum necked up to accept a 0.51 in (13 mm) diameter bullet. The .500 A-Square is capable of achieving 8127 ft·lbf (11,018.7 J) energy with a 600 gr bullet launched at 2470 ft/s (752.9 m/s).
See also
- Weatherby Magnum
- List of rifle cartridges
- 11 mm caliber11 mm caliberThis article lists firearm cartridges which have a bullet in the through caliber range.All measurements are in millimeters .-Pistol cartridges:-Revolver cartridges:-Rifle cartridges:-See also:...
- .45 Caliber Rifle Cartridges
- .378 Weatherby Magnum.378 Weatherby MagnumThe .378 Weatherby Magnum was designed by Roy Weatherby in 1953. It was an original belted magnum design with no parent case, inspired by the .416 Rigby and headspacing of the belted .375 H&H Magnum. The 215 magnum rifle primer was developed by Federal specifically for this round. The cartridge can...
- .416 Weatherby Magnum.416 Weatherby MagnumThe .416 Weatherby Magnum is a belted, bottlenecked cartridge designed by Ed Weatherby and launched commercially in 1989. It is a dangerous game cartridge intended for the hunting of heavy dangerous game such as elephant and African Cape buffalo. It is considered the most powerful commercial .416...
- .30-378 Weatherby Magnum.30-378 Weatherby MagnumThe .30-378 Weatherby Magnum is a cartridge introduced by Weatherby in 1996 that uses the same case as the previously existing .378 Weatherby Magnum and .460 Weatherby Magnum, necked down to a 30 caliber bullet. It is offered with bullets between 165 and 200 grains in factory loading, generating...
- .338-378 Weatherby Magnum.338-378 Weatherby MagnumThe .338-378 Weatherby Magnum started out as the wildcat cartridge, .338-378 Keith-Thomson Magnum during the early 1960s. Keith and Thomson are Elmer Keith and R.W. "Bob" Thomson. The 338-378 Keith-Thomson Magnum is slightly shorter than the .338-378 Weatherby Magnum. However this is only a neck...