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Britain - Rifle Anti-tank 0.55in Boys Mk1

Showing the details of the shells used(where known)
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Weapon Details
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Rifle Anti-tank 0.55in Boys Mk1
(Anti Tank Gun)
Blank
photo of Rifle Anti-tank 0.55in Boys Mk1 from Wikipedia
History
The Boys Anti Tank rifle was a large bore rifle firing an armour piercing .55 inch round. It was a poorly designed gun making maintenance extremely difficult. Used against lightly armoured vehicles in the early war, it soon became ineffective as armour thicknesses increased.
Manufactured1937 - 1940
Calibre13.90mm
LengthL/65
Rate of Fire10 rpm
 
Boyes AP(AP)
13.90mm 0.05Kg 990M/Sec
Range(Mtr)1002004008001200160020002400
Flight Time(Secs) 0.11 0.26
Penetration(mm@30°) 12 8
Penetration(mm@0°) 15 10
Hit Probability(%) 98 98


 
Boyes AP Tungsten Cored(AP40)
13.90mm 0.05Kg 990M/Sec
Quoted Penetration 24mm @ 100mtr/0° ( ≈ 24mm/0°)
Range(Mtr)1002004008001200160020002400
Flight Time(Secs) 0.12 0.29 0.95
Penetration(mm@30°) 105 82 45
Penetration(mm@0°) 122 95 53
Hit Probability(%) 98 98 98

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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