Read through this, thanks for all the work and information.
One thing happened to me at a gunshow in December, I bought a nice-looking Smith .357 Magnum and it turns out I CAN'T eject the magnum cases after firing--not without extreme measures anyway. It's been cleaned multiple times, including with a chamber brush attached to a drill, by a gunsmith even. It looks like the chamber dimensions might be off.
How can you tell if a revolver will eject properly, when checking it out at a show? I did not spot that advice in your guide but admit I may have missed it.
Closer inspection after learning of my new problem, I noticed a bunch of scratch marks on the rear of the cylinder. Obviously previous owners were PRYING cases out. Damn. But is there any other clue to this issue?