One thing I haven't seen noted, and I do not know if this is modeled...but the imapct of flying INTO a buffs guns is certainly going to do a bit more damage...I mean, I'm no phsyics guru but it would seem you have the energy of the round fired, plus the momentum of the aircrafts speed INTO that. Follow?
Good points, all. The B17 seems to be guilty of being the incredible ack star, while the Lancaster leads the pack in loosing either guns to damage or running out of ammo fast.
Ju88s just run out of airplane
As to B26s, I always seem to loose an engine, and at altitude, the B26 cant fly it on one engine, so its always a long descent back for home.
TBMs, well, that bird always looses a chunk of the wing (usually the left wing) and starts doing to wing dropping similar to the F6Fs, from my experience.
Arados have little Jesus Statues on the dash for buff pilots to pat, and hope the cons cant gain on you