May I ask how? You probably wont even break anything on a F6F with 200 .303 rounds from 2 guns
It's not very probable under normal combat circumstances, but doable and far from impossible. Get close, aim well - and convergence isn't an issue anyway.
I have killed enemies with 109's and 190A5 BB's before without having to pump 500 rounds into them. And was killed myself by D3A's and Stukas, which have the same pitiful 2*8mm armament.
Any gun can & will kill if circumstances are right.