7.7 x 56R : [IND] Cartridge, SA, Ball, .303-inch, Mk 2
Ammunition round, silver round and brass casing.
Inscription: letter 'N' in the headstamp denotes Dum Dum, and the letter 'I', manufacture in India. Cordite Mark II (2) Ball was approved for land and naval service in July 1893. It differed from Cordite Mark I (1) in using a larger Berdan primer, rather than a Boxer primer. Its unsatisfactory terminal ballistic performance in the Chitral and Tirah expeditions on the North West Frontier of India in 1897 and 1898 spurred the development of expanding bullets, which brought international protest, led by Germany, as they breached the St Petersburg Declaration and the Hague Convention. Adequate terminal performance was finally achieved with the Mark VII (7) round approved in March 1910, and employing a lighter, less stable spitzer bullet at higher velocity.