Maybe the other guys flying the A6M2's are just much better pilots than me, but I find it rough going in the Zeke against even the lowly P40b. One on one, it's usually a draw unless I let him get me in a HO or he let's me engage him. You have to be very close in the Zeke to do real damage, I don't event shoot my cannon from farther than 200 and those 7.7's are a ploy to get you to maneuver.
If the 40b pilot knows what he's doing when he loses the ad he will dive imediately, pull out and waggle. He waggles just enough so that you can't get a good shot, but not enough to slow down. Slowly he pulls out of cannon range, extends and comes back for another HO.
In groups, even with even #'s the zeke is at a disadvantage. I can get on an allied plane's tail, but not be able to stick around long enough to get good shot. After a few seconds, his buddy is knocking on my tail, praying and spraying 50 cals from 750 out. One ping and I'm either pilot wounded, lost oil or have a fuel leak. Usually its the dreaded pilot wounded. Very frustrating