.303 Magnum

Centerfire rifle cartridge .303 Magnum England Rifle W. J. Jeffery & Co. 1919 1919–1932 .276 Enfield Semi-rimmed or rimless, bottleneck .312 .345 .462 .530 .557 2.35 3.35 73.6 174 2850 3050 Cartridges of the World. The .303 Magnum is an obsolete medium bore rifle cartridge. Overview The .303 Magnum was a bottlenecked centerfire rifle cartridge that was produced in both semi-rimmed and rimless versions. The cartridge fired a projectile of 174 gr g at 2850 ft/s m/s. The cartridge's case capacity was the same as the .30-06 Springfield, although performance was considered to favour the .303 Magnum. The .303 Magnum was developed by W. J. Jeffery & Co. by necking up the experimental .276 Enfield to .312 in mm, it was introduced in 1919 for target shooting and was used for some time by the British Match Rifle Committee. The cartridge had a brief life, only appearing in the Kynoch catalogue until 1930 and it appears to have become obsolete by 1932. See also .303 British 7mm rifle cartridges List of rifle cartridges References Frank C. Barnes, Cartridges of the World, 13th ed, Gun Digest Books, Iola, 2012, 978-1-4402-3059-2. Don Davie, "The other .303 cartridges", acant.org.au, retrieved 25 January 2015. Imperial War Museums, "7.7 x 59.4Sr: Kynoch; .303 Magnum", iwm.org.uk, retrieved 10 November 2017. External links Cartridgecollector, ".303 Magnum Rimless", cartridgecollector.net, retrieved 16 December 2016. Cartridgecollector, ".303 Magnum Semi Rimmed", cartridgecollector.net, retrieved 16 December 2016. Category:British firearm cartridges Category:Pistol and rifle cartridges Category:W. J. Jeffery & Co. cartridges Category:Weapons and ammunition introduced in 1919