 The 76 mm was first tested on the M4A1 series tank which carried 90 rounds of 75 mm ammunition, while most other models carried 97 rounds of 75 mm.The 76 mm cartridge reduced this to 83 rounds.By late 1943, the Army had adopted the wet storage system of water containers among the rounds, to reduce fires and for the 76 mm gun this provided 71 rounds of ammunition, while the 75 mm could carry 104 rounds.