Britain Ordnance Q.F. 6pdr 7cwt MKI-III

Showing the details of the shells used(where known)   Tweet Weapon Details Ordnance Q.F. 6pdr 7cwt MKI-III (Anti Tank Gun) History The 6pdr Mk II—differed from the pre-production Mk I in having a shorter L/43 barrel, because of shortage of suitable lathes. The subsequent Mk IV was fitted with an L/50 barrel, with muzzle brake. Manufactured 1942 - 1945 Calibre 57mm Length L/43   Shot, AP, Mks 1 to 7 (AP Armor Piercing) 57mm 2.86Kg 853M/Sec Quoted Penetration 68mm@915m Range(Mtr) 100 200 400 800 1200 1600 2000 2400 Flight Time(Secs) 0.12 0.24 0.5 1.09 1.78 2.61 3.61 4.86 Penetration(mm@30°) 90 83 74 63 53 44 35 28 Penetration(mm@0°) 105 96 86 73 62 51 41 33 Hit Probability(%) 98 98 98 98 77 41 22 8 Vehicles in our database using this gun Vehicle Name Common Name   AEC Armoured Car Mark II     Carrier AEC 6pdr Gun Mk I Deacon     Cruiser Mk VI Crusader III     Cruiser Mk VII Cavalier     Cruiser Mk VIII Centaur I     Inf Tank Mk III Valentine IX     Inf Tank Mk III Valentine VIII     Inf Tank Mk III Valentine X     Cruiser Mk VIII (Cromwell I A27M) Cromwell I A27M     Cruiser Mk VIII (Cromwell II) Cromwell II     Cruiser Mk VIII (Cromwell III) Cromwell III     Inf Tank Mk IV Churchill 3 - III     Inf Tank Mk IV Churchill 4 - IV     Ram Mk II     Inf Tank Mk IV Churchill 3 - III     Cruiser Mk VIII Cromwell I/II/III

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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