The .45-70 handguns have been around for over 50 years. There was a 45-70 revolver produced back in the 1960s. I think it was made by Century Arms? The modern .500 S&W is more like the powerful 50-70 Springfield. These handguns have produced a surgical boom. More shooters are having fractured hands, wrist and elbows. There is a limit to what the human hand and arm can stand.