I did a search for this , came up empty....I recently sent my SRH to Ruger in Connecticut for repairs. After firing several rounds , the cylinder would "jam" up ,not rotate either by single action or double action. Nothing found in the action, the bullets were not jumping crimp.......its chambered in 454 , it would do this in both 45 and 454. Didn't seem to matter about the pressure of the load. I heard one time that someone was having problems with the cylinder of a SRH 454 actually coming partially unlatched under HEAVY recoil , thus putting the cylinder out of time if only slightly , but enough to cause it to jam up. Anybody else ever have this problem with their SRH ?? I sent my back several weeks ago , I'm anxious to hear what the problem was. Thanks ,, irold