7.62 NATO The 7.62 NATO also known as its metric nomenclature; 7.62x51mm, is a .30" caliber, rimless, bottleneck cartridge case design, centerfire rifle cartridge. The 7.62 NATO cartridge casing is reloadable after the cartridge has been fired or spent with various combinations of primer, powder and .308" diameter bullets. Specifications: Cartridge … [Read more...] about 7.62X51 NATO