.280 Remington
Encyclopedia
The .280 Remington, also known as the 7 mm Express Remington, was introduced in 1957 for the Remington model 740, 760, 721 and 725 rifles. The .280 is based on the .30-06 Springfield
necked down to accept 7 mm (.284in) bullets, with the neck moved forward .050in (1.27mm). Original loadings were 125, 150 and 165 grain bullet weights.
, it had somewhat unspectacular sales; Remington renamed the cartridge in 1979, calling it the 7 mm Express in an attempt to increase sales. This resulted in people confusing it with the 7 mm Remington Magnum
and Remington eventually changed the name back to .280 in 1981.
of heavier .284" bullets give the .280 Remington a slight ballistic advantage over the .270 Winchester.
. Thus, the .280 has a better trajectory and retains more energy downrange. The .30-06 produces more energy than the .280 with bullets heavier than 180 grains, though .284" 175 grain bullets have a high sectional density
of .310, compared to the 30-06 180 grain bullet with a moderate sectional density of .271. The .280 is suitable for hunting any game in North America with good shot placement.
SAAMI
pressure limit for the .280 Remington is set at 60,000 PSI
, 50,000 CUP
.
Most American rifle and ammunition manufacturers catalogue the .280 Remington.
In bolt action rifles the .280 Remington is not popular in Europe, where it competes with the 7x64mm
, to which it is almost ballistically identical. But does have a larger than expected number of European users in imported self-loading rifles such as those by Remington. When compared to the .280 Remington the 7x64mm has a slightly higher maximum allowed chamber pressure and as a European 7 mm cartridge has a slightly larger bore. European 7 mm cartridges all have 7.24 mm (0.285 in) grooves Ø diameter. American 7 mm cartridges have 7.21 mm (0.284 in) grooves Ø.
.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...
necked down to accept 7 mm (.284in) bullets, with the neck moved forward .050in (1.27mm). Original loadings were 125, 150 and 165 grain bullet weights.
History
Having been released 32 years after the .270 Winchester.270 Winchester
The .270 Winchester was developed by Winchester Repeating Arms Company in 1923 and unveiled in 1925 as a chambering for their bolt-action Model 54. The cartridge is based upon the .30-06 Springfield...
, it had somewhat unspectacular sales; Remington renamed the cartridge in 1979, calling it the 7 mm Express in an attempt to increase sales. This resulted in people confusing it with the 7 mm Remington Magnum
7 mm Remington Magnum
The 7mm Remington Magnum rifle cartridge was introduced as a commercially available round in 1962, along with the new Remington Model 700 bolt action rifle. It is a member of the belted magnum family that is directly derived from the venerable .375 H&H Magnum...
and Remington eventually changed the name back to .280 in 1981.
280 Remington vs. 270 Winchester
The .280 Remington is capable of generating slightly higher velocities with a given bullet weight than the .270 Winchester, and also able to use heavier bullets due to the larger .284" diameter. .284" bullets also have higher ballistic coefficients at the top of the weight spectrum than .277" bullets. The greater energy and higher ballistic coefficientBallistic coefficient
In ballistics, the ballistic coefficient of a body is a measure of its ability to overcome air resistance in flight. It is inversely proportional to the negative acceleration—a high number indicates a low negative acceleration. BC is a function of mass, diameter, and drag coefficient...
of heavier .284" bullets give the .280 Remington a slight ballistic advantage over the .270 Winchester.
280 and .30-06
The .280 Remington is capable of developing energy nearly equal to the .30-06 Springfield, but with lighter bullets having a better ballistic coefficientBallistic coefficient
In ballistics, the ballistic coefficient of a body is a measure of its ability to overcome air resistance in flight. It is inversely proportional to the negative acceleration—a high number indicates a low negative acceleration. BC is a function of mass, diameter, and drag coefficient...
. Thus, the .280 has a better trajectory and retains more energy downrange. The .30-06 produces more energy than the .280 with bullets heavier than 180 grains, though .284" 175 grain bullets have a high sectional density
Sectional density
Sectional density is the ratio of an object's mass to its cross-sectional area. It conveys how well an object's mass is distributed to overcome resistance. For illustration, a needle can penetrate a target medium with less force than a coin of the same mass...
of .310, compared to the 30-06 180 grain bullet with a moderate sectional density of .271. The .280 is suitable for hunting any game in North America with good shot placement.
SAAMI
Saami
Saami or SAAMI can stand for:*Sami people*Sami languages*Sporting Arms and Ammunition Manufacturers' Institute...
pressure limit for the .280 Remington is set at 60,000 PSI
Pounds per square inch
The pound per square inch or, more accurately, pound-force per square inch is a unit of pressure or of stress based on avoirdupois units...
, 50,000 CUP
CUP
The acronym CUP may refer to:* California University of Pennsylvania* Cambridge University Press* Canadian University Press, the press association of Canadian student newspapers* Candidatures d'Unitat Popular, a Catalan nationalist movement...
.
Most American rifle and ammunition manufacturers catalogue the .280 Remington.
In bolt action rifles the .280 Remington is not popular in Europe, where it competes with the 7x64mm
7x64mm
The 7x64mm is a rimless bottlenecked centerfire cartridge developed for hunting. As is customary in European cartridges the 7 denotes the 7 mm bullet caliber and the 64 denotes the case length...
, to which it is almost ballistically identical. But does have a larger than expected number of European users in imported self-loading rifles such as those by Remington. When compared to the .280 Remington the 7x64mm has a slightly higher maximum allowed chamber pressure and as a European 7 mm cartridge has a slightly larger bore. European 7 mm cartridges all have 7.24 mm (0.285 in) grooves Ø diameter. American 7 mm cartridges have 7.21 mm (0.284 in) grooves Ø.
See also
- 7 mm Weatherby Magnum7 mm Weatherby MagnumThe 7 mm Weatherby Magnum is a powerful 7 mm rifle cartridge offered by the Weatherby firearms company in their Mark V rifles. The cartridge was one of the first cartridges offered by the Weatherby company....
- 7 mm-08 Remington7 mm-08 RemingtonThe 7mm-08 Remington is a rifle cartridge that is almost a direct copy of a wildcat cartridge developed around 1958 known as the 7mm/308. As these names would suggest, it is the .308 Winchester case necked down to accept 7 mm bullets with a small increase in case length...
- 7 x 57 mm Mauser7 x 57 mm MauserThe 7×57mm cartridge, also known as the 7 mm Mauser, 7×57mm Mauser, 7 mm Spanish Mauser in the USA and .275 Rigby in the United Kingdom, was developed by Paul Mauser of the Mauser company in 1892 and adopted as a military cartridge by Spain in 1893. It was subsequently adopted by several...
- 7 mm caliber7 mm caliberThis article lists firearm cartridges which have a bullet in the to caliber range.*Length refers to the cartridge case length.*OAL refers to the overall length of the cartridge....
- List of rifle cartridges
- Delta L problemDelta L problemThe delta L problem is a condition that occurs regarding certain firearms chambers and their practical incompatibility with ammunition made for the corresponding chambering....
- Sectional densitySectional densitySectional density is the ratio of an object's mass to its cross-sectional area. It conveys how well an object's mass is distributed to overcome resistance. For illustration, a needle can penetrate a target medium with less force than a coin of the same mass...
- Ballistic coefficientBallistic coefficientIn ballistics, the ballistic coefficient of a body is a measure of its ability to overcome air resistance in flight. It is inversely proportional to the negative acceleration—a high number indicates a low negative acceleration. BC is a function of mass, diameter, and drag coefficient...
- 7 mm-06.30-06 Springfield Wildcat CartridgesWildcat cartridges are firearms cartridges whose dimensions have been modified. Usually these modifications are with an eye toward improved performance, either measurable or not. This article deals with wildcat cartridges which result from a simple necking down or up of the original .30-06...