IMHO, the .50 smoothy would be the equivalent of a 34 ga shot gun with a cylinder bore when loaded with shot. This would be far more capable than a 410 shot gun! the .56 smooth bore would be closing in on or surpass a 28 ga. (.55) in capability with shot. Either should work well with RB out to 50+ yards with RBs. Load development is the important thing with all smooth bore guns.

My son would rather hunt deer in thick stuff with his New Englander 12 ga with RBs over 70 gr. Pyro. than his .54 barrel. Out to 100 yards it is well within minute of deer. He likes the speed of using just a bead sight in thick cover.

Ken
Central NY