Here's a happy ending. Bought a 452490gc Lyman mold for my newly rebarreled 45 SAA a couple of months ago. Cast some last week that miked at 450/451, slipped right thru the SAA's cylinder. A Uberti copy was a closer fit, but the groove seemed a little bigger than the throats..Anyway went out today with some loaded up with titegroup and shot up 30 or 40 rounds..not on paper but kept cans bouncing around...Checked the barrel before going to remington swaged hollow bases ( puts the crud into cruddy bullets) and the barrel was slicky clean. Now if I could find a bullet for the SAA.