7.62x51mm NATO and .308 Winchester are essentially the same cartridge. [0] It's basically the same situation as 5.56×45mm NATO vs .223 Remington. There's a lot

7.62x51mm NATO and .308 Winchester are essentially the same cartridge. [0] It's basically the same situation as 5.56×45mm NATO vs .223 Remington. There's a lot of ~7.62mm cartridges out there, as a carryover from when people used imperial units. (It's basically .30 inches) [1] 0: https://www.shootingillustrated.com/articles/2018/8/19/308-win-vs-762-nato-whats-the-difference/ https://www.shootingillustrated.com/articles/2018/8/19/308-w... 1: https://en.wikipedia.org/wiki/7.62_mm_caliber https://en.wikipedia.org/wiki/7.62_mm_caliber