I don't quite understand why guys buy a big gun and then want to download it or shoot shorter cartridges in it. Shooting 45 Colt loads in a 454 Casull chamber can, as they say, "ring the chamber" and cause erosion of the chamber. Later, when shooting the longer 454 Casull cartridges, extraction or ejection problems can occur.
As it was originally designed for use in Freedom Arms revolvers, the 454 Casull cartridges was loaded up to 65,000 psi. If you use the lower pressure loads found nowadays in manuals, you might not have problems with extraction of 454 Casull cases in chambers previously used to shoot 45 Colt cartridges but if you shoot full house loads, you probably will have problems.
As it was originally designed for use in Freedom Arms revolvers, the 454 Casull cartridges was loaded up to 65,000 psi. If you use the lower pressure loads found nowadays in manuals, you might not have problems with extraction of 454 Casull cases in chambers previously used to shoot 45 Colt cartridges but if you shoot full house loads, you probably will have problems.