Originally posted by Golddog:
K frames are a lot easier to shoot well. Get a J only if weight is a major consideration - their DA triggers are difficult to master.
That may be true as a general rule, but every 640 I have ever fired, as well as my 940, have had very good triggers, right on a par with K frames, smooth, stage well, etc. And with use, most J frames smooth up nicely.
To be clear, my advice re Model 40 and 649 is arguably colored by the fact that I have both, and both are available for purchase, but that did not influence my advice, which I stand by. They are nice revolvers, and I think the m.40 would do well in a smaller hand than mine. For me, I would add a Tyler Tee grip adapter, but I have very long hands/fingers. She should try the feel of whatever you are thinking of, and I think first impressions are probably pretty good.
I only have two alloy pieces, a Colt Cobra and a model 37, they tend to lose their charm after about 100 rounds of range firing, and that is with .38's. I would advise against her using a .357 magnum round in a snub. .38 wadcutters do a very respectable job. That doesn't mean you can't use a .357 revolver, such as a 640-1, or a more modern model 60, just don't load it with .357s.