Personally I'd get it in .45 Colt and just skip the .454. When you load a round with the bullet all the way out to the end of the cylinder, you have just as much case capacity as a .454, so you can essentially duplicate the ballistics without having to buy that expensive brass.
If I ever wanted anything more powerful than a 5 shot .45 Colt, I'd go bigger, not faster. .475 Linebaugh would be my next step, and you can shoot .480 Ruger in a .475 for lighter loads.
Agree with all written completely.
