The M4 105mm Howitzer used in the M4 Sherman weighed 1140 poundsIt has been, but my Carden is concerned with an effective dual-purpose tank gun. The 17-pdr's HE capability was always going to be limited. He is also thinking about the next gun. Yes, we know the 17-pdr is enough gun for the rest of the war, he doesn't. If the Venom is 5-6 inch armoured, then there's a good chance German tanks will be likewise (King Tiger has over 7-inches in places?). The capture of some 88mm Flak guns in North Africa will help give the Allies a real knowledge of what they're up against. I think looking a jumping the 95mm towards a 102mm, or better yet, 105mm gun is well worth looking at, even at this point.
the 25pdr used with British SPGs was 1124 pounds
17 pdr was 2032 pounds in weight , US M3 90mm was 2450 pounds. the high power US 90mm was the the T15E2 90mm 3270 pounds and far more powerful.
The real monster was the US 105mm T5E1 used in the T28 GMC, 6484 pounds.
The energy of the various cannons
-Br- 77mm HV – 7.71kg at 785m/s = 2,383,866 joules
-Br- 17pdr QF – 7.71kg at 884m/s = 3,021,246 joules
-US- 90mm M3 – 10.914kg at 853m/s = 3,983,662 joules
-US- 90mm T15E2 – 10.9kg at 975m/s = 5,196,586 joules
-Br- 32pdr QF – 14.515kg at 878m/s = 5,608,738 joules
-US- 105mm T5E1 – 17.7kg at 914m/s = 7,416,335 joules
With new steels and developments, the British L7 weighed 2826 pounds, and had almost the same power as the T5E1, 7,096,896 joules of muzzle energy
It replaced the 20 pounder, that was pretty much an improved 17 pounder
The 20 pounder weighed 2885 pounds with 4,545,000 joules of muzzle energy