Think my hot load was ramshot enforcer, think h 110 was close and Lil gun not far behind. My fps drop from 8 to 4 was more than expected as was my jump to a 16.5 inch rifle. We piced together the lightest single shot 500 we could, it's about an inch longer than a child's chipmunk and even amongst my friends that are experienced gun guys it's been dropped at least 3 times firing.
Glad to hear guys are finding success with the 4in version. Considering how many fps my loads lost from the 8 I've wished they had done a 5 like the 460 or a double lug 6. I'm self admittedly a lousy pistol shot, for some reason I shoot the shorter version much worse than the longer. Maybe it's time to swap a red dot off the 648, certainly easier to carry the 4.
Recoil at the top end of the load chart can be punishing, but at lower speeds I've found it to be downright tolerable if not fun. Definitely a niche category that isn't for everyone, have one crewman that rattled off 3 of 5... handed the pistol back to me and said he'd take his chances with the bears over pulling the trigger again.
Anyone try the modern taurus 500s? I have a pretty good scar on my hand from a Taurus in 44 that decided to index incorrectly and had me swear off their revolvers. Im told these are made at a different plant, qc has improved in decades since my incident and they are making 5 and 6 inch versions that I'd like to try.