From: Encyclopedia of Tanks, Duncan Crow & Robert J. Icks, Chartwell Books, 1975 Basic Gun Data NOTE: Various discrepancies may be noted. This is because the length in calibres is given as ascribed by the country concerned and the bases used are not necessarily uniform. M /V is in feet per second. Country Gun Calibre Length M/V Year (inches) USA 37mm 1.46 L/57 2900 1940 75mm Pack 2.95 L/18 1270 1930 75mm M1897 2.95 L/36 2000 1924 75mm M2 2.95 L/31 1930 1941 75mm M3 2.95 L/40 2030 1941 75mm M6 2.95 L/39 2030 1942 3" M7 3.0 L/53 3400 1942 76mm 3.0 L/53 2600 1942 76mm T91E3 3.0 L/55 3400 1943 90mm 3.543 L/53 3350 1943 90mm 3.543 L/73 3750 1943 105mm How 4.134 L/25 1550 1942 105mm Gun 4.134 L/67 3700 1943 120mm 4.7 L/62 3800 1943 Great Britain 6pdr 2.244 L/45.6 1765 1915 6pdr 2.244 L/25.4 1350 1916 3pdr I 1.85 L/35.8 1750 1923 3pdr II 1.85 L/45.7 1850 1925 3" How 3.0 L/28.5 600 1926 2pdr 1.575 L/57 2800 1935 6pdr III 2.244 L/49 2800 1941 6pdr V 2.244 L/57 2965 1942 3.7" Mortar 3.7 L/17 620 1939 95mm How 3.7 L/23.7 1075 1942 75mm V 2.953 L/41.6 2030 1942 77mm 3.0 L/56 2600 1943 17pdr 3.0 L/62.9 2900 1942 Germany 3.7cm 1.46 L/45 2500 l938 5.0cm 1.97 L/42 3240 1938 5.0cm 1.97 L/60 3700 1939 7.5cm 2.95 L/24 1263 1938 7.5cm 2.95 L/43 2428 1940 7.5cm 2.95 L/48 2461 1940 7.5cm 2.95 L/70 3068 1942 8.8cm 3.46 L/56 2600 1936 8.8cm 3.46 L/71 3720 1943 10.5cm 4.134 L/28 10.5cm 4.134 L/68 12.8cm 5.039 L/55 3080 1944 15.0cm 5.90 L/12 780 1933 15.0cm 5.90 L/29.5 France 3.7cm 1.46 L/21 1273 1917 3.7cm 1.46 L/33 2300 1938 4.7cm 1.85 L/34 2200 1935 7.5cm 2.95 L/36 1788 1898 7.5cm 2.95 L/17.1 1500 1932 USSR 3.7cm 1.46 L/44 2500 1930 3.7cm 1.46 L/71.8 2900 1935 4.5cm 1.772 L/46 2700 1936 7.62cm 3.0 L/18.8 1930 7.62cm 3.0 L/34.7 1938 7.62cm 3.0 L/47.3 2l72 l939 8.5cm 3.346 L/44 1942 8.5cm 3.346 L/55.8 2600 1944 10.0cm 3.937 1944 12.2cm 4.803 L/49 1939 15.2cm 5.98 L/31.9 1939