::.303 British


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{{ safesubst:#invoke:Unsubst||$N=Use dmy dates |date=__DATE__ |$B= }} {{#invoke:Infobox|infobox}} The .303 British (designated as the 303 British by the C.I.P.<ref name="ReferenceA">C.I.P. TDCC datasheet 303 British</ref> and SAAMI<ref name="ReferenceB">SAAMI Drawing 303 British</ref>) or 7.7×56mmR, is a {{safesubst:#invoke:convert|convert}} calibre (with the bore diameter measured between the lands as is common practice in Europe) rimmed rifle cartridge first developed in Britain as a black-powder round put into service in December 1888 for the Lee–Metford rifle. In 1891 the cartridge was adapted to use smokeless powder.<ref name="Cushman"/> It was the standard British and Commonwealth military cartridge from 1889 until the 1950s when it was replaced by the 7.62×51mm NATO.<ref name="ReferenceA"/>

.303 British sections
Intro  Cartridge dimensions  Military use  Military surplus ammunition  Headstamps and colour-coding  Japanese 7.7 mm ammunition  Civil use  Weapons chambered for .303 British  See also  References  External links  

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