Hmmm, I tried it several times on different levels and damn, the damage looks the same everywhere. Fishy. My memory isn't *that* bad and I remember that the many times I've played the retail (I think that I flew the Bearbeating several dozen times then) and I never managed to one-hit destroy the main turret, despite using afterburners, different angles, double Helios and whatnot. Then I upgraded my FS2 to FSO (I was somewhere around Bearbeating then) and turned on Medium. Bang, now I am unable to NOT destroy a turret with one hit... Call that strange.
It was definitely not flak and not a single bomb, and at that time I had only the 3.6.7 version I believe (can be wrong) and the official mediavps. I am not capable of recreating or explaining it, but I remember very clearly that I could bring the turrets condition down only to 15% with double Helios.
Apparently one of the quirks of my old PC, hehe
