Britain Anti-Tank Gun, 25 mm Hotchkiss

Showing the details of the shells used(where known)   Tweet Weapon Details Anti-Tank Gun, 25 mm Hotchkiss (Anti Tank Gun) History French Anti Tank gun issued to the BEF in 1939 most captured by the Germans at Dunkirk Manufacturer Hotchkiss Manufactured 1939 - 1940 Calibre 25mm Length L/72 Rate of Fire 20 rpm   Hotchkiss 25mm (AP Armor Piercing) 25mm 0.32Kg 950M/Sec Quoted Penetration 47mm @ 100mtr/0° Range(Mtr) 100 200 400 800 1200 1600 2000 2400 Flight Time(Secs) 0.11 0.23 0.52 1.33 2.78 6.24 Penetration(mm@30°) 40 33 25 16 9 4 Penetration(mm@0°) 47 39 30 19 11 5 Hit Probability(%) 98 98 98 90 39 3

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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