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United States - 40mm Automatic Gun M1

Showing the details of the shells used(where known)
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Weapon Details
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40mm Automatic Gun M1 Blank
photo of 40mm Automatic Gun M1 from Wikipedia
History
Designed in 1930 in Sweden the Bofors had two variants the L/60(really L/56) and the L/70 which didn't reach production till 1948, so the data shown is for the L/60 version. America manufactured this gun from 1941 and Chrysler added water cooling.
ManufacturerBofors
Manufactured1933 - present
Calibre40mm
LengthL/56
 
AP(AP)
40mm 0.86Kg 926M/Sec
Range(Mtr)1002004008001200160020002400
Flight Time(Secs) 0.11 0.23 0.48 1.08 1.85 2.88 4.32 6.49
Penetration(mm@30°) 59 54 47 38 31 24 18 12
Penetration(mm@0°) 69 63 55 45 36 28 21 15
Hit Probability(%) 98 98 98 98 74 34 15 3

Vehicles in our database using this gun
Vehicle NameCommon Name
 Twin 40 mm Gun Motor Carriage M19 
 

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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