.270 British

Cartridge .270 British United Kingdom Rifle post-WWII yes Rimless, bottleneck 7.04 7.73 10.7 11.3 10.9 46 62.3 yes gram 6.48 840 2286 The .270 British (or .270 Enfield) is an experimental intermediate rifle cartridge that was developed by the British at the same time as the .280 British as a potential successor to the .303 British cartridge.http://www.quarryhs.co.uk/Assault.htm Assault Rifles and their Ammunition: History and Prospects Williams Anthony G. November 2014 Military Guns & Ammunition 30 December 2018 5 November 2017 https://web.archive.org/web/20171105042707/http://www.quarryhs.co.uk/Assault.htm dead The rimless cartridge has a base diameter of 11.3 mm (like the Russian 7.62×39mm) and a case length of 46 mm.http://home.wanadoo.nl/cartridges/270_enfield.htm# .270 Enfield British Military Cartridges 12 February 2013 dead https://web.archive.org/web/20130927031353/http://home.wanadoo.nl/cartridges/270_enfield.htm# 27 September 2013 The bullet is a standard .270/.277 caliber bullet with a light 100 gr weight with a muzzle velocity of 840 m/s ft/s on, similar in performance to the later 6.8mm Remington SPC. It was not good at long range, but its slender case had the potential to fire a heavier bullet at a relatively high velocity. It was optimized for shorter ranges, while the .280 favored long-range performance to try to meet U.S. requirements. The cartridge was not adopted, the British initially focused development on the .270, then ultimately chose the NATO-standard 7.62×51mm cartridge. References Popenker Maxim Williams Anthony G. 2005 Assault Rifle Crowood 978-1861267009 Category:Pistol and rifle cartridges Category:Experimental cartridges