I keep hoping S&W will release the new 640 Pro without the internal lock but with a 3" barrel (and maybe a pinned front sight?).
Sunday I shot my 3" SP101 and my new 637 side by side with the same ammo (7.0 Longshot, 125JHP, IIRC) and really noticed a big differance in blast. Recoil was obviously diminished by weight, but the blast was very noticeable, and obviously reduced blast has to me some more velocity.
Someday I may launch a quest for a 360...
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I want to say I've seen S&W 642s with a 3" barrel, but maybe it was 2.75".
http://www.snubnose.info/docs/m10.htm
My first carry gun. It's a 1953 M&P K-frame.
US Navy Veteran
1961-1965