Loading outside the accepted safe load's in any case (brass) is not a safe activity and should be avoided. Extra void space in the 454 case using a 45 LC load could very likely cause problems for you and your weapon. Nosler notes that the acceptable powder charges for a 260g bullet using IMR4227 in the 45LC are between 22 and 23g's...the same power/bullet combo in the 454 calls for a charge of between 31 and 33g's, a very big difference in the world of handloads and one I wouldn't chance. Ringing of ones cylinder is hardly worth the risks and really has no impact on weapon performance...shoot 45LC's like I do in mine and ensure the safety of yourself and those around you.


Check http://www.saami.org/specifications_...wnload/205.pdf for acceptable pressures.