45 Colt cases are weak. They split down the middle of the case. 44 Magnum are stronger cases and split at the tips where they are the weakest. I've cut down split 44 mag case to load 44 specials. I know that 454 cases were made stronger to handle the load. I just agreed to buy a 454 Casull rifle and ammo and was wondering if a 454 case could be trimmed to load 45 Colts? Not that I need 45 Colt cases but was wondering if anyone has ever tried this?