7.62x51mm NATO 150 Grain FMJ-500rds
The 7.62×51mm NATO is very similar to the .308 Winchester cartridge; they are nearly completely interchangeable and share the same dimensions (7.62x51mm). The 7.62×51mm NATO is rimless. It uses a large rifle primer, and a .308 caliber (7.82mm) bullet. The bullet is 51mm long, and the cartridge has an overall length (OAL) of 2.75 inches. It is best fired from a barrel with a 1:12 rifling twist, and fires with a muzzle velocity between 2600 and 2800 feet per second, dependent on powder load, bullet weight, and barrel length. Bullet weights range from around 150 grains to 190 grains. However, the 7.62 NATO can use any projectile the .308 Winchester uses; pressure will be slightly lower. The 7.62 NATO fires at a maximum pressure of 60,200 PSI (50,450 CUP). This is slightly less than the pressure of the .308 Winchester.
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