Although use of the word "Cordite" in titles had lapsed in 1907, it was sometimes reintroduced to the Mark VII during World War I to distinguish it from the nitrocellulose loaded version. The bullet was to design RL 17069B and both these designs were later replaced by DD/L/14006. 303 inch Mark VII” was approved to design RL17146 in November 1910 and shown in LoC Paragraph 15629 dated October 1911. These were identified by parts of the case being blackened and in some cases by an overstamp of "NRA" on the headstamp.ĭrawing RL15572 G for the original 160 grain Mark VII bullet.
#USED CENTURY ARMS L1A1 FREE#
The last two digits of the manufacturing year were added (this being the Financial Year from 1st April to 31st March) and for ammunition supplied by commercial contractors two Broad Arrows were added to the headstamp on acceptance by government inspectors.The army supported the National Rifle Association matches at Bisley with a free issue of ammunition and specially selected lots of Mark VI were supplied as Match ammunition. At the same time, two further changes took place in the headstamp. The core was an alloy of 98/2% lead antimony.The propellant charge was 31 grains of Cordite size 3 3/4 with a single glazeboard wad to give a muzzle velocity of 1,970 feet per second at a pressure of 17.5 to 18 tsi.Initially the case bore the letter "C" for Cordite but this was omitted from future manufacture from April 1907. Like its predecessor Mark II, the Ball Mark VI had a round nosed 215 grain bullet but with a thinner cupto-nickel envelope to increase lethality.
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