Although this is some what anecdotal, I have been reading a book titled "The Last 100 Days" and an account of Hans Ulrich Rudel was presented in one of the chapters. During a sortie on Feb 8th 1945, the day in which he lost his foot, he killed 9 Soviet tanks including an IS3. It seems to me through the accounts of Oberst Rudel, that the effectiveness of the Bordkanone 37mm was greater in RL then in AH. On the first pass Rudel quote on quote smoldered the IS3, and the second pass in which the starboard 37mm jammed, one 37mm hit exploded it. A subsequent flack hit after pulling up from the attack severed his foot.
