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The .303 British (designated as the 303 British by the C.I.P. [2] and SAAMI [3]) or 7.7×56mmR, is a .303-inch (7.7 mm) calibre rimmed tapered bottleneck centerfire rifle cartridge. The .303-inch bore diameter is measured between rifling lands as is the common practice in Europe which follows the traditional black powder convention.
The .303/25, sometimes known as the .25/303 is a wildcat centrefire rifle cartridge, based on the .303 British, necked down to fire a .257 projectile, originating in Australia in the 1940s as a cartridge for sporterised rifles, particularly on the Lee–Enfield action; similar versions also appeared in Canada around the same time.
.303 British.303 Magnum.303 Savage.375/303 Westley Richards Accelerated Express.307 Winchester.308 Marlin Express.308 Norma Magnum.308 Winchester.308×1.5" Barnes.310 Cadet.318 Westley Richards.32 Remington.32 Winchester Self-Loading.32 Winchester Special.32-20 Winchester.32-40 Ballard.32-40 Winchester.325 Winchester Short Magnum.327 Federal Magnum
The rifle was designed with an iron sight line consisting of rear receiver aperture battle sight calibrated for .303 British Mk VII ball ammunition at 300 yd (274 m) with an additional ladder aperture sight that could be flipped up and was calibrated for 200–1,000 yd (183–914 m) in 100 yd (91 m) increments and 1,000–1,650 yd (914–1,509 ...
The .303/22, sometimes known as the .22/303, is a wildcat centrefire rifle cartridge based on the .303 British, necked down to fire a .224 projectile, originating in Australia in the 1930s as a cartridge for sporterised rifles, particularly on the Lee–Enfield action. Similar versions also appeared in Canada around the same time. [3]
This mark was adopted by the Canadian government in 1867 upon its creation as a Dominion to replace the British government's broadshead arrow mark. The ammunition color code system used by Canada used the British system for .303 ammunition, the American system for .30-06 ammunition, and later the NATO system for all other ammunition.
The Royal Ordnance Factory was established in 1940 to produce ammunition, and was acquired by BAE Systems Global Combat Systems in 1987. [1]On the 20 August 2008 the Ministry of Defence announced a £2bn contract with BAE Systems to supply British forces with small arms and medium calibre ammunition, [2] guaranteeing production at the Radway Green site until at least 2023.
NA&A Co (National Arms & Ammunition Co) Martini–Enfield rifles were very well made and are more than capable of handling modern commercial .303 British ammunition, but, as with all second hand firearms, they should always be checked by a competent gunsmith before attempting to fire them.