Uh... WRONG...
Those vickers S-guns are utter and TOTAL crap.
They aren't. They are just difficult to employ without some practice due to low rate of fire and short ammo clip, forcing the player to shoot precicely from close range & rather steep angles to make his shots count.
But in terms of ammo penetration, there is no tank in AH that the Hurri D can't destroy. Back when the Il-2 only had the 23mm gun and there was no B-25H yet, only the Hurricane D could kill a Tiger without ords. It was my main tankbusting ride for a long time for a good reason. The cannons are powerful enough to take on any tank we currently have in AH.
I have the exact info on my PC at home, perhaps Loosche can post it. I know he has it because he is where I got the comparing info from. 
According to
Anthony G Williams the NS-37 fires a 760g projectile at 880 m/s, resulting in a muzzle energy of 294 kJoule. The Vickers S shoots a 1,130g projectile at 615 m/s, giving it a muzzle energy of 214 kJoule.