Lazzeroni cartridges are a range of extremely powerful proprietary magnum

Magnum

Magnum may refer to several things:* Moses Magnum, a Marvel Comics villain*Magnum, P.I., a television series** Thomas Magnum, the lead character...

 sporting rifle

Rifle

A rifle is a firearm designed to be fired from the shoulder, with a barrel that has a helical groove or pattern of grooves cut into the barrel walls. The raised areas of the rifling are called "lands," which make contact with the projectile , imparting spin around an axis corresponding to the...

 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...

s developed and manufactured since the early 1990s by US hunting enthusiast John Lazzeroni. All cartridges in the Lazzeroni family are distinguished by their high operating pressures, and the very high bullet

Bullet

A bullet is a projectile propelled by a firearm, sling, or air gun. Bullets do not normally contain explosives, but damage the intended target by impact and penetration...

 muzzle velocities

Muzzle velocity

Muzzle velocity is the speed a projectile has at the moment it leaves the muzzle of the gun. Muzzle velocities range from approximately to in black powder muskets , to more than in modern rifles with high-performance cartridges such as the .220 Swift and .204 Ruger, all the way to for tank guns...

 and bullet energies they produce.

To handle these specialised cartridges, Lazzeroni developed a specially designed range of sporting rifles, each costing around US$5,000 new, and using a combination of stainless steel

Stainless steel

In metallurgy, stainless steel, also known as inox steel or inox from French "inoxydable", is defined as a steel alloy with a minimum of 10.5 or 11% chromium content by mass....

 (for barrels and actions) and fibreglass (for the rifle stocks). To produce very high bullet velocities, these relatively lightweight and very distinctively streamlined rifles have long (typically 26in) barrels.