I don't know if this is relevant or not, however my .357 Handi-Rifle barrel will not shoot the 158 gr. Keith-style SWC bullets worth a hoot. I would get groups such as you described. It shoots good groups with every jacketed bullet I have tried. In desperation, I tried some of the cowboy action style 158 gr. LRN bullets and, low and behold, they shot as well as the jacketeds. Who can figure? I've always been given to believe that the hard-cast SWCs are usually the most accurate. They sure have been in my .45 Colt Blackhawk.
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