The pistol is rated for 'mid range' wadcutters, but for the life of me, I don't ever remember seeing that referenced anywhere other than in relationship to Model 52's. Loading below 800 fps should be satisfactory, but these guns have a reputation for being finicky until you find the right combination. Lots of folks report using Bullseye and 231. IIRC, the sweet spot for mine was 3.3 grains of 231 with Hornady HBWC's.

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So many S&W's, so few funds!!