fire long, heavy bullets with a high sectional density. Canadian Rangers use it for survival and polar bear protection. In 2015, the Canadian Rangers began the process to evaluate rifles chambered for .308 Winchester. The Canadian Department of National Defence has since replaced the previously issued Lee–Enfield No. 4 rifles with the Colt Canada C19 chambered as evaluated in 7.62×51mm NATO/.308 Winchester. Rounds developed from .303 Pre-WWI sporting rounds During the 1890s, Scottish gunsmith Daniel Fraser developed a rimless version of the cartridge known as ".303 Fraser Velox" or ".303 Fraser Rimless", loaded with a bullet of his own oblique ratchet design to enhance expansion which was patented in 1897 The bullet was also used in a proprietary loading of .303 British marketed as ".303 Fraser Flanged". Proprietary loadings of .303 British include the ".303 Marksman" by Eley Brothers from before 1908. and ".303 Swift" from before 1911. In 1899, the British service round was lengthened and necked-out to create the .375 Flanged Nitro Express hunting cartridge for single-shot and double rifles. Around 1905, it was necked down back to create .375/303 Westley Richards Accelerated Express. Post-1917 military experiments In 1917, design work started on a more powerful military cartridge of the same calibre and overall length. In 1918 it was planned that the new round, also retaining the old rim diameter, would be used in rechambered P14 rifles with AP rounds to defeat German targets on the battlefield of WWI as well as in the RAF in modified Lewis gun. The cartridge was "produced in quantity" but not adopted formally. The case was 62mm long with the bullet (a Ball Mark VII or Mark VIIW) set deep within to keep overall length down. The ordinary round was designated "Cartridge S.A. ball .303 inch Rimless" despite the fact that it retained headspacing on its rim and was semi-rimmed. It's better known today under names like ".303 Lewis Semi-Rimmed". Post-1945 Australian wildcats After WWII, Australians founds themselves with quite a few .303" service rifles but at the same time new legal restrictions on military ammunition, which led to development of many wildcat rounds, the best-known of which are .303/25 and .303/22. Post-1945 South African developments In parallel to Australia, the same wildcatting was happening in other countries of the Commonwealth, and in 1969 Pretoria Metal Pressings started factory production of a .303 necked down to 6 mm (.243") under the name