Here is a modded pistol that shoots 60 caliber elephant gun rounds. The recoil is rated at 9.4 which is 9 times more than a hard hitting 30-06, which is rated at 1.0. This guy had no clue what he was getting himself into until it smacked him in the forehead!
Why would anybody even make such an idiotically designed “weapon” unless you wanted to hurt the shooter.