Cartridges: 308 Winchester and 7.62 NATO centerfire rifle cartridges are also known as their metric nomenclature 7.62x51mm. Both of which are .30″ caliber, rimless, bottleneck centerfire rifle cartridge case designs that are reloadable with various combinations of primer, powder and .308″ diameter bullets. 7.62 NATO cartridges are normally loaded to slightly lower chamber pressure levels […]