Guys, Ruger itself recommends a barrel change if you are ramping a 45lc up to 454c because of the metal makeup of the barrel. Yes yes I know The pressure is primarily in the chamber of a revolver but if Ruger says you might oughtta do it, then I think I'm going to listen to them. Same thing goes for the cylinder, different metal content that isn't near rated for the pressures of the .454c. Not to mention the amount of meat you are taking from the cylinder walls anyway.