My highest kill sortie ever was in the A6M5b, 12 kills, no vulchs and no rearm. Not many luftberry turnfests either. Lots of snap shots and quick kills in a quarter turn. I am not really very good though, I was just in the groove that day. My other high kills in one sortie are 8 and I've done that in the P-38L, Typhoon, Mosquito, N1K2-J and Ki-84.