Thanks for the compliment, Snappy...pretty wood on a great revolver. As to your problem, as Hondo says, it could be a cylinder/barrel forcing cone gap that's just too fine, or it could be a recoil shield ( the circular portion of the frame right around the firing pin hole.) If the cylinder is just too short for the frame, a factory problem, the rear of the cartridge drags as it passes the firing pin hole as the gun is cocked. Either is a problem best cured by Ruger at the factory in my opinion. Best regards, Rod