Chasmatic, though I don't know where to find the link to show you, I have read one among many very convincing articles that say to leave the trigger pull weight of the 317 unaltered as this WILL cause light strikes.
I'm going to write something sacrilegious, please, nobody crucify me, Chasmatic, you may want to consider buying your wife an old model Beretta 86 Cheetah. The beauty of this gun, though it is a semi-auto, is that you do not need to work the slide to load the chamber. It is a tip up barrel design, push a lever, the barrel's chamber end pops up, drop a round in, pop the barrel closed, and it's ready to fire with a fairly light, smooth double action pull, or you can cock the hammer for a single action shot.
Meanwhile, it's chambered for .380, which is really not that much less potent than a standard velocity .38 Special (standard pressure loading, non +P) out of a snub.
The downside, it won't come cheap, I believe sellers are getting about $600 on up for the Beretta 86. I've always wanted one of these, but do not own one. I have had my hands on them before, they are light, the perfect size for nearly everyone, they're beautiful, and have decent power, you also get 9 shots.
My next suggestion likely won't be cheap either, buy a K frame Smith & Wesson chambered for .22, I'd suggest a pencil barrel but they are known as the "postal model" or something like that and they are crazy priced at around $3000, so some other .22 caliber K frame may be a good idea, they are still fairly light and the double action trigger pulls are definitely lighter than the J frames.
Finally, unrelated to your question but always a good idea for me to say this, never dry fire .22 caliber revolvers and maybe not even autos, but I do know it's bad for the .22 Smith, the factory advises against this. Additionally, the .22 dummy rounds sold by AZOOM, those are not snap caps, I bought a set and THEN read on the package that they are not to be used as snap caps and will not protect the firing pin from damage. I've read that dry firing a .22 revolver will eventually damage the firing pin. Just thought I'd mention it!
