Cannon rounds, for the most part, are HE. Most likely the round hit the armor plate, the engine or somewhere else near the cockpit and you got splash damage from it (shrapnel) and thus a pilot wound.
Yes, true, but the PW damage model DOES need redone in the corsair T_T...
Flying earlier, just one example of it, p51 saddles up on me, starts shootin at d600, 1 .50 hits my direct 6 o' clock (yes, 1, that's all the pings I saw/heard) and KAZAM!! I have a PW in a 1d from 6 'o' clock...
For some reason, I think a .50 cal round from d600 woulda been stopped by the armor plating in the back, if they won't be, I'll trade my 6 view for 'Pilot Protection' (it's like one of those schams on TV... BUY ONE NOW!! GET THE OTHER FREE!! *in quiet, fast speak* pay triple shipping and handling)...
My .02 on THAT whole subject...