I think the governor style revolver that shoots the 454 casull, the .410 shotgun round and the 45 colt is the one I would want. It's for protection in the wilds while hiking and camping. It can also handle the Cor-Bon ammo in 45 colt. The .410 buckshot would be my favorite loads for ccw carry around around the civilization.
Buckshot for CCW? Sounds like you are begging for trouble.