I got rid of a 642 for a Kahr MK9 but now I miss the way the j-frame carried in a pocket holster. Especially the easy fast draw.
I carried speer short barrel 38+p and practiced with it until I could easily hit the 50 yard sillouette at our range.
I am now torn between getting another 642 or the m&p 340, should have never let it go in the first place.
Here are the numbers from speer for their gold dot short barrel loads:
38 special +p 135g
velocity in feet per second: muzzle: 860 25yrds: 838
Energy in foot pounds: muzzle: 222 25yrds: 211
357 magnum 135g
velocity in feet per second: muzzle: 990 25yrds: 957
Energy in foot pounds: muzzle: 294 25yrds: 275
*Also, I have never tried the double tap speer gold dot 38+p 125g, but they claim:
velocity: 1.875" bbl S&W - 1100fps and muzzle energy: 336 ft. lbs. from 1.875" bbl