I shot a friends .475 a few times. IIRC, recoil felt about the same as a .44 Blackhawk with 290 grain hardcast.
It was just a stunt, but I qualified for my CHP with a Casull one-handed. Used the stoutest loads I had, 355 grains at 1675 fps. Shook so bad at the end I could barely hold it on target. At the beginning, I was working on my between-the-eyes shot placement on Paul Bunyan targets.