I chrono'd my S&W model 52-1 a while back. Factory Federal 148 gr. HBWC shot at 755 fps. out of my gun on that day. My reload is 2.8 grains of Alliant Bullseye with a Zero 148 gr. HBWC, seated flush. I loaded them in Remington brass with a light taper crimp. It shot 730 fps that same day.
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