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British Guns 37mm and 40mm calibre

Name Calibre/
Length
Projectile Penetration (mm)
Type Name Weight
(kg)
Muzzle
Vel (m/s)
Angle
(deg)
Range (m)
  91    457   914  1,371 1,828
Ordnance, QF,
2–pounder
Mk.IX, Mk.IXA,
Mk.X and Mk.XA [1]
Germany: 4cm Pak 92(e)
40mm/L50 AP Shot, AP, Mk.1T 1.08 792 30° 55 47 37 27  
Shot, APHV/T 1.08 853 30°   57 45    
APCBC Shot, APCBC, Mk.1T 1.22 792 30°   57.5      
Ordnance, QF,
2–pounder
Mk.XB (with
Littlejohn adapter) [2]
40mm/L50 APCNR Shot, AP/CNR, Mk.1 0.57 1,280 30°          
Shot, AP/CNR, Mk.2 0.45 1,189 30°          

Copyright © 1999 David Michael Honner. Based on British specifications unless otherwise noted.

Weapon Data Presented Elsewhere

Ordnance, QF, 37–mm Mk. I. These were Swedish anti-tank guns. The British 7th Armoured Division “appropriated for use” weapons intended for the Sudanese in the Western Desert in 1941. I think this means they stole them!

Footnotes

1. Ordnance, QF, 2–pounder Mk.IX, Mk.IXA, Mk.X and Mk.XA. Source: Chamberlain, Peter and Ellis, Chris: British and American Tanks of World War II; Gudgin, Peter: Armoured Firepower; Jentz, Thomas L: Tank Combat in North Africa and Hunnicutt, R. P.: Sherman: A History of the American Medium Tank. The penetration data from Jentz is about 10% lower than Hunnicutt’s for the AP projectile; I have used Jentz’ data in the table above. Jentz has no data for the APHV projectile so I have used Hunnicutt, and Chamberlain and Ellis for this. Jentz’ data is definitely based on the pre ’42 British criteria for the target armour plate. Gudgin’s data has been used for projectile weights and muzzle velocities as it is more complete. APCBC was introduced in September 1942. None of the 2–pounder armour piercing projectiles had any explosive filler. [up]

2. Ordnance, QF, 2–pounder Mk.XB. Source: Chamberlain, Peter and Ellis, Chris: British and American Tanks of World War II; Gudgin, Peter: Armoured Firepower and Hogg, Ian V.: British and American Artillery of World War Two. The Littlejohn adapter was a squeezebore attachment on the muzzle and was introduced in January 1943. None of the 2–pounder armour piercing projectiles had any explosive filler. [up]

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Copyright © 1999 David Michael Honner. E-mail: GvA@wargamer.org.