I shoot (carry) a 640 Pro in 357 magnum with 357 magnums every time I am at the range. I don't find it a problem. Of course 38 spl is less recoil. I do have a problem with the Ultra lights Sc, Ti models. 360PD etc. They are abusive. I bought one of those and sold it 4 weeks later. But the steel J frames I find ok as a CCW to shoot. I don't take it to the range to have fun like i would with my 66s or 19s or 686 or even my Ruger GP100. But for why it is built I think S&W did well. I carry mine more than any other revolver. I have observed anecdotely that everyone has a different tolerance for recoil especially in snubbies. I also think the 357 magnum recoil is a bit sharper for lack of a better description than even the larger bore revolvers. I have .44 mag, 4606 XVR and a 500SW all in 4" or shorter. I shoot all of them and don't plan to sell them. Yet I sold my SC/TI 360 PD almost immediately after shooting 2 or 3 cylinders from it.

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John 1:17
NRA Life Benefactor