66912, thanks for the info. FWIW, I have had mine for about 10 years and have taken 6 whitetails with it. It has never seen a factory load or a warm load. My handload for it used to be a 300 gr. JHP and 52 grs. of 3031 ( about 1700 FPS ) and was a terrific deer stopper, but the last and biggest one I took with it presented an angle in which I had to shoot through a shoulder. The bullet still did it's job and the big buck ran only a short distance, but there was NO blood on the ground at impact or the short jaunt he took because the bullet did not quite exit the body, hence no exit hole . Fortunately, I was in a fairly open area. Often times I'm not, and do rely on a blood trail in very dense cover even when tracking distances are short. This all lead me to changing to a Rem. 405 JFN and 32 grs. of IMR 4198 ( about 1350 FPS ) but much greater penetration capability if heavy bone is struck. This load also is a quick stopper. Knock on wood, I've never experienced the action opening upon recoil, but I'm careful about leaving the locking mechanism dry. Regards