6.8spc

6.8mm Special Purpose Cartridge (Remington)

6.8mm is the (approximate) diameter of the rifle bore for the caliber cited. The 6.8 SPC cartridge was developed after reports of the NATO standard 5.56mm cartridges being less effective than desired. 6.8mm SPC was designed specifically for improved performance in barrier penetration, especially from the short barreled rifles commonly used in modern urban combat.

6.8spc

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