I'm pondering if to pick up some extra die sets. 45Colt would definitely be in the list, dunno about 454Cas.
This begs the question... 45colt and 454cas have the same bullet diameter (both should be sized 0.452 when dealing with jacketed rounds).
You mentioned that the bullet's been cast, has it also been sized as well ? If we size it, you'll prolly wanna rebuff it as well.