I've fired several rounds through a S&W .500 revolver and a couple of guns in .460 and .454. Nice to play with once in a while, but I have no desire to own one. I have a 4" S&W 629 and a 6 1/2" model 624 in .44 special, a S&W model 58 in .41 magnum and a couple of handguns in .45 Colt and .357 magnum. They're large enough to have fun with, without the pain the larger calibers can sometimes leave you with!!