And which one of these clips shows a bomber absorbing a 50mm rocket like its nothing? Which one of these clips shows a B-17 just shaking off 3 engine fires and a fuel fire in the main wing? Which one of these clips shows any of these planes and pilots approaching the degree of accuracy and repeatability that is present in WarThunder?
They likely gave it filler so that the pen formula would give it lower pen on top of being considered an SAP round.
If you mean stuff like the 35mm Oerlikon AP-I rounds, they are genuinely explosive. AP-I seems to be a designation more just because explosions can technically set fires.
50mm cannon guarenteed kill with a direct hi-
Oh look a 50mm me410 pulling off its failed attack run on a b17 with a suspiciously 50mm sized hole in the wing that very much is still attached