Shooting 50's and hitting with them are great fun but hunting with a 25-30+ pound weapon is a bit much and not feasible or practical.

Said again, I feel there is a distinct difference between shooting and hunting!! Rich mans game? Maybe, but then Double rifles are too. Accurate shooting at a distance with a 50 isn't hunting but can be a very satisfying experience!!

Yes, almost as much fun as a Double!
Contrast that to hunting with a Double where you have the hunt close and personal AND the expensive firearm!!