I have 7 S&W .357 MAG revolvers; 19 (4"), 27 (3.5"), 27 (5"), 66 (4"), 66 (5"), 520 (4"), and 620 (4"). I like the 4" 66, but the 4" 620 fits my hand better and I shoot it better than any of the others. I didn't think that I'd like the 7-shot 520 and 620, but the action seems smoother when shooting double action.
I got the 19 in 1970 and shot it a lot, but mostly with mild 38 Specials, as they were about 1/3 the price of .357 MAG factory loads. Ahlman's in Morristown, MN, trimmed the barrel on the 5" 66 from its original 6" and they tuned and reamed the forcing cones on 6 of the 7 revolvers, only the 3.5" 27 is still 100% original.
