RE: double barrel 50 cal
I never knew Tradition's made such a beast. With 1-28 twists it has to be aimed at the modern in line market. Many states only permit the one barrel. This would be the answer in states that allow it and you wanted a fast second shot. Be a lot of fun actually. Although I would wonder where both barrels would hit in relation to an identical POI.
This muzzleloading stuff has really came a long way from my old T/C Renegade I started with.