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303 British ammo for sale online or in-store at Sportsman's Warehouse. Find a full line of 303 British ammo from all major ammunition manufacters.

Crafted with meticulous attention to detail, .303 British ammunition delivers unparalleled accuracy and reliability, ensuring that enthusiasts and collectors alike can experience the true essence of classic British firearms with every shot.

The .303 British or 7.7×56mmR, is a .303-inch caliber rimmed rifle cartridge first developed in Britain as a black-powder round put into service in December 1888 for the Lee-Metford rifle. In 1891 the cartridge was adapted to use smokeless powder.

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bulk 303 british ammo ships free at ammoman! .303 British ammunition is a rifle and machine gun caliber that Great Britain placed into service in 1888. 303 British served as the standard cartridge of the British military for more than 60-years, until its replacement by the 7.62 NATO round.