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. The rimless cartridge has a base diameter of 11.3 mm (like the Russian
7.62×39mm
The 7.62×39mm (also called 7.62 Soviet, formerly .30 Russian Short) round is a rimless bottlenecked intermediate cartridge of Soviet origin. The cartridge is widely used due to the global proliferation of the AK-47 rifle and related Kalashn ...
) and a case length of 46 mm.
The bullet is a standard .270/.277 caliber bullet with a light 100 gr weight with a muzzle velocity of , 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
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Pistol and rifle cartridges
Experimental cartridges
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