Fuel consumption can afford another look, but the guns are fine.
It's the fighter pilots who (generally) don't know what they're doing. This get them killed by buff guns.
Perfect example, I ran a lone B-26 into enemy Airspace, dropped by ord., and turned to sea, for the return flight. I had 3 Bogs following me, dead six, co alt, trying to catch up. Bog 1 gets within 1K, Tail gun opens up, one missing wing. Bog 2, La7, same story. Now, if you were Bog 3, would'ny you try something different? Nope, came in dead red, Co alt. Kill 3.
Now, I ran into an ace the other night. He knew every one of my weak spots. Came in under me, blasted upward, firing all the way, and then inverted and came back down. I lost an engine and an Aileron. I must have hurt this pony, because he broke off after his second pass. Still, another pass and he would have had me. I can tell an ace from a newb the minute they are within 2k.
And the Aces ALMOST ALWAYS beat my buffs guns.