Thanks for all the advice here! I actually fire at 150 yards just like my convergence, but I'm for sure going to try a mix of incendiary and AP at the wing root!
And for sure there are many records of pilots emptying all their ammo with no result, at the other hand there are a lot of "I fired a short burst and saw the left landing gear falling down" etc.... Never happens to me
Then of course the Polish head on is attractive
Will try that too. This sim has so much potential now that the fps is decent. Eagerly awaiting my 2600k / GTX580 rig to throw some hardware at the problem also!