A fellow I used to work with had one of those single shot pistols with the breech that rotated open, I forget the name, in .308. I count shooting it as one of the biggest mistakes I have ever made in my shooting career. I have a .44 Magnum and in comparison, it was like shooting a .38 special to that .308. It was only but for the grace of God that I managed to not lose my grip on it. I lost a week's work while the tendons in my wrist healed and I was pushing a strong 275 lbs at the time. I took 4 KV at 1 Amp jolt from my pinky to my elbow once that hurt less. I'll never try a hand cannon again.
I know what your are talking about. I recently fire six Hypo 357mag rounds out of one of those Light Weight Smiths. Though not as traumatic as your experience, for weeks after word I, the web of the hand could diffidently tell I was shooting. Though these things are nice to carry, but target practice better be with very light target loads, saving the kill loads for the Crumbesians.
On a lighter note, my Revolver Cannot be described as a Hand Cannon at all. Even though it has much more power than the 454 Casual and on par with the 460 S&W it has a noticeably milder recoil. Not sure why, but I think it's because of how we burn the powder, with a fatter column as opposed for the narrower column of powder..t
PS.. Now that I'm thinking about it. Remind me, I seem to remember something about solids in a revolver and the so-called cop killer debacle. And I seem to remember that we either can't use the solids in a pistol or it was over-turned or something like that. Also, if it turns out that a solid can't be used in a pistol and a rifle cartridge can and they both share the same cartridge, isn't there some kind of conflict with the rifle cartridge now, not being able to use the solids, because its ammo can be used in a pistol? I seem to remember such conflicts, but that they have been resolved or am I mistaken? I'll bet one of our guys has the skinny on this..t