I used to own a Heym .600 NE. It weighed 14.75 pounds. The recoil would send the muzzle almost vertical and sometimes I would momentarily black out when shooting it. I would aim, shoot and then realize that I was looking up in the sky and that there was also a gun barrel pointed up there.

Generally it took me 10 minutes between shots to recover enough to shoot the 2nd shot well. But I could put 3 shots offhand into a 3 inch group at 50 yards. Never shot it off the bench and would never even consider doing it.

I sold the gun because it was too heavy and kicked too much. Spent the money on elephant hunting.