You are WRONG. I would shoot that thing with SOMEONE ELSE'S hand!!! :-)
I fired a friend's 45-70 lever action monster once with the 510 grain bullets and that was enough for me! My sissy 686 357M is plenty of excitement for me in the meantime.
A 510 gr from a lever action probably left you with a bit of a bruise. For a real knock down experience, shoot a 416 Weatherby Magnum. I had a buddy with one of those rifles. He was the 3rd owner. In his possession was the first box of ammo purchased to go with the rifle. Only 3 rounds consumed. The rest are available to the next macho shooter who just has to own and shoot the rifle.
I compete with that 686+ using my own loads of West Coast Bullet 148 gr DEWC bullets over 3.4 gr of W231 powder. It's dirt simple to pull off a score of 96+ at 25 yards on the standard slow fire target. I like the West Coast product because the double ended bullet has a cannelure on each end and they are consistently swaged. Get the seating depth right and you can pull them off the Dillon 550 bullet tray without even looking at them.