303 Ball c powder 303 load data pdf can handle up to 365. 303 British chambered arms in C.
Measured between the grooves, the nominal size of the bore is . 303 military surplus rifles are often found ranging from around . Recommended bullet diameter for standard . 303 British cartridges is . During a service life of over 70 years with the British Commonwealth armed forces the . 303-inch cartridge in its ball pattern progressed through ten marks which eventually extended to a total of about 26 variations. 303 British is relatively low compared to many other service rounds used in the early 20th century.
303 Mark I and Mk II service cartridges employed a 215-grain, round-nosed, copper-nickel full-metal-jacketed bullet with a lead core. After tests determined that the service bullet had too thin a jacket when used with cordite, the Mk II bullet was introduced, with a flat base and thicker copper-nickel jacket. Mk IV and Mk V loadings, which were put into mass production. The design of the Mk IV hollow-point bullet shifted bullet weight rearwards, improving stability and accuracy over the regular round-nose bullet.
Mk III, Mk IV, and Mk V were withdrawn from active service. The concern about expanding bullets was brought up at the 1899 Hague Convention by Swiss and Dutch representatives. The Swiss were concerned about small arms ammunition that “increased suffering”, and the Dutch focused on the British Mark III . The British and American defense was that they should not focus on specific bullet designs, like hollow-points, but instead on rounds that caused “superfluous injury”. The parties in the end agreed to abstain from using expanding bullets.
As a result, the Mark III and other expanding versions of the . Boer guerrillas allegedly used expanding hunting ammunition against the British during the war, and New Zealand Commonwealth troops may have brought Mark III rounds with them privately after the Hague Convention without authorization. 1904, using a round nose bullet similar to the Mk II, but with a thinner jacket designed to produce some expansion, though this proved not to be the case. In addition to being pointed, the round was also much lighter in order to deliver a higher muzzle velocity. It was found that as velocity increased the bullets suddenly became much more deadly. In 1910, the British took the opportunity to replace their Mk VI cartridge with a more modern design. The Mk VII was different from earlier .