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Dean, Ruger lists RedHawk but I would call Ruger Firearms Customer Service to verify before purchasing at at 336-949-5200 Monday through Friday 8:00am - 6:00pm ET

Dean, Not really. 45 long colt can be fired from a 454 Super Redhawk, but the indentation for the moon clips are not in the cylinder to accept the moon clip. .45ACP head spaces off the mouth. It is also a smaller cartridge and will, as you would find out, fall into the chamber. No, even a moon clip will work. The case would not be supported in the larger chamber and would split and spit hot gasses perhaps back in your face. The bullet diameter is the only thing similar and a .45ACP would require a completely different cylinder as with the swap cylinder .45 Colt/ACP in the Blackhawk. The reason the .45 Colt will work in a .454 is the same reason the .38 special will work in the .357 or the .44 special will work in the magnum or the .22 Short will work in the Long Rifle. It's just shorter, no other difference. The .45ACP case isn't even close to the .45 Colt or .454. Think of the .45 ACP and Colt/.454 as with the .22LR and .22 Mag. Actually, not headspacing on the rim, a .45ACP is even