From a 1 7/8" S/W 640 145 STHP's crony 1250 FPS and 125 Winchester's Crony 1350 FPS.
You will find more variation from barrel to barrel tan you will with a shorter barrel.
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Retired Law Enforcement
U. S. Army Veteran
Armorer
My rifle and pistol are tools, I am the weapon.
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