Way back when, I wore a badge and carried a Combat Commander. I loaded the old Speer #4477 200 grain hollowpoint (the flying ashtray) over a 20% overload of bullseye. I worked up to the load, and I wouldn't recommend it to anyone else. It worked in my weapon. But after around 5000 rounds, it bulged the chamber. (Yes, I know. It was too hot. But I wanted the velocity.) I replaced that barrel and went on about my business. As far as I'm concerned, it was a successful load, given its purpose. And the FBI (at a firearms trainers course) decided my load had the best combination of penetration and mushrooming of anything brought to the course. That ranged from .38 Specials to .44 Magnums (which blew through the test media and were judged as "fornicate me, I don't want to be shot with THAT!!).