Ammunition
It fired 2 types of high-explosive shells, which differed only in which fuzes they could accept. It used a three part charge in its cartridge case. Charge 1 yielded a muzzle velocity of 555 metres per second (1,820 ft/s). Charge 2 replaced Charge 1 in the cartridge case and propelled the shell with a velocity of 696 metres per second (2,280 ft/s). Charge 3 was added to Charge 2 and raised the muzzle velocity to 757 metres per second (2,480 ft/s).
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