Britain Ordnance Q.F. 75mm

Showing the details of the shells used(where known)   Tweet Weapon Details Ordnance Q.F. 75mm (Tank Gun) History This was a temporary fix to the problem of 6pdr guns not having a powerful enough HE shell. It was created by boring out the British 57mm 6pdr to take the American 75mm AP/HE shells, which reduced the Anti Tank performance but provided HE support. Manufactured 1943 - 1945 Calibre 75mm Length L/32 AP M72 U.S. (AP Armor Piercing) 75mm 6.58Kg 618M/Sec Range(Mtr) 100 200 400 800 1200 1600 2000 2400 Flight Time(Secs) 0.16 0.33 0.68 1.45 2.31 3.29 4.41 5.71 Penetration(mm@30°) 98 91 83 73 64 55 46 38 Penetration(mm@0°) 114 106 96 85 74 64 54 45 Hit Probability(%) 98 98 98 88 54 25 15 3 HE M48 (HE High Explosive) 75mm 6.76Kg 625M/Sec 0.680Kg explosive Maximum Range not shown as gun elevation is limited Range(Mtr) 100 200 400 800 1200 1600 2000 2400 Flight Time(Secs) 0.16 0.33 0.68 1.43 2.29 3.25 4.36 5.65 Direct Fire Range(Mtr) 100 200 400 800 1200 1600 2000 2400 Flight Time(Secs) 0.16 0.33 0.68 1.43 2.29 3.25 4.36 5.65 Hit Probability(%) 98 98 98 88 57 25 15 3 Blast/Fragmentation Effects Burst radius Infantry in open 99% kill 3 mtr Burst radius Infantry in open 66% kill 6 mtr Burst radius Infantry in open 33% kill 16 mtr  Armour Penetration inc roof at 1 mtr 2 mm An explosion within 3 mtr of infantry in the open will cause 99% casualties - lethal. An explosion within 6 mtr of infantry in the open will cause > 66% casualties and could damage some AFV's. An explosion within 16 mtr of infantry in the open will cause 33% casualties. The blast effect of this shell exploding within 1 mtr of an armoured vehicle will penetrate 2 mm of the tank armour including the roof. Vehicles in our database using this gun Vehicle Name Common Name   AEC Armoured Car Mark III     Cruiser Mk VIII Centaur III     Cruiser Mk VIII Cromwell IV/V     Inf Tank Mk III Valentine XI     Inf Tank Mk IV Churchill Crocodile     Inf Tank Mk IV Churchill 9 - IX     Inf Tank Mk IV Churchill 10 - X     Inf Tank Mk IV Churchill 11 - XI     Cruiser Mk VIII (Cromwell IV) Cromwell IV     Cruiser Mk VIII (Cromwell VII) Cromwell VII     Inf Tank Mk IV Churchill 6 - VI     Inf Tank Mk IV Churchill 7 - VIII     M3 Grant Grant     Cruiser Mk VIII Cromwell VII/VIII     Cruiser Mk VIII Cromwell II Mk I

Hit probability is based on a static 2 x 2.4 metre panel at 0 degrees(vertical) at the range specified.

The data that has been used to create these records has come from Wikipedia, The Lone Sentry, The Bundes Archive and numerous books and websites that have provided the detailed information that has not been available anywhere else. The information we use to calculate the penetration tables, flight times and the hit probability comes from the Gun Calibre, the Shell Mass(Kg) and the muzzle velocity, plus range reductions to allow for gravity and wind resistance. This calculation originally came from a pre-war Krupp calculation which has been modified, and seems to fit the actual test results.

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