of 6 mm Musgrave. .303 Epps Canadian Ellwood Epps, founder of Epps Sporting Goods, created an improved version of the .303 British. It has better ballistic performance than the standard .303 British cartridge. This is accomplished by increasing the shoulder angle from 16 to 35 degrees, and reducing the case taper from to . These changes increase the case's internal volume by approximately 9%. The increased shoulder angle and reduced case taper eliminate the drooping shoulders of the original .303 British case, which, combined with reaming the chamber to .303 Epps, improves case life. The .303 British case was also used as a parent case for the South African designed 6mm Musgrave cartridge that was billed as a cheap surplus alternative to the popular .243 (6.2 mm) Winchester. Firearms chambered in .303 British 1885 Courteney Stalking Rifle Bren light machine gun Browning Model 1919 machine gun aircraft version BSA Autorifle Canadian Ross Rifle Mk I through III Caldwell machine gun Charlton Automatic Rifle Darne machine gun Farquharson rifle Hotchkiss .303 Mk I & I* Huot automatic rifle Jungle Carbine Lee–Enfield rifle Lee–Metford rifle Lewis gun McCrudden light machine rifle Martini–Enfield rifle P14 rifle Parker Hale Sporter Rifle Ruger No. 1 Thorneycroft carbine Vickers-Berthier light machine gun Vickers machine gun Vickers K machine gun Winchester Model 1895 See also 7 mm caliber (overview of cartridges) British military rifles List of rifle cartridges Table of handgun and rifle cartridges .303 Magnum .303 Savage Notes References External links 7,7 x 56 R Tipo 89 Giapponese C.I.P. TDCC datasheet .303 British SAAMI Drawing 303 British .303 British firearms British firearm cartridges Military cartridges Pistol and rifle cartridges Rimmed cartridges Weapons and ammunition introduced in 1889