Karnak - 10 years have gone by. The MA has evolved.
I highly doubt it has changed in a way that will massively affect the impact of an unperked F4U-1C.
Oh, I agree it won't hit 20+% of the kills, but it will blow anything now, including the P-51D, out of the water as it claims first place.
It is just too good and the guns, which you are undervaluing, are a major part of that. It kills
fast because of how potent its guns are and the ammo supply is rivaled only by the much slower N1K2-J and much less agile Fw190A-8. The much larger and less agile Mosquito Mk VI carries significantly less ammo. All three of those also carry significantly less ordnance.
Once again, I ask you to look at the relative performance of the Spitfire Mk XIV, that you are using as a comparison, and the F4U-1C as perk planes. Seeing as you claim neither would be more dominating than the other how do you explain the vast gulf between their respective stats as perk planes?