You haven't met 99000 I recon, coming in from behind his set of b17s, at 1.5k out your plane already lost parts ,and have departed controlled flight before reaching 1.0k.
No heavy bomber could ever do raids unescorted during ww2 without suffer heavy losses, except for some isolated fights.
Also HTC say they are trying to be as close as real life as possible in FM's, and flying @ 525mph diving in a formation and still be able to shoot at 1.5k is not one of them.
Only some can catch a b17 doing that, and they have to close in painfully slow doing it, giving the gunners almost 800 yards in the bomber to shoot at the fighter before it can effectively shoot back.