I am going to buy a handgun for my wife to have at home when I travel. We have decided on a revolver. The autos are just to complicated for her. She would shoot 38 special ammo only, even though I would buy a .357 magnum. In the $500 price range I was looking at a 4 inch new Ruger GP100 or a very, very nice condition used S&W 686. What are your thoughts? I know you can dry fire the Ruger without hurting it, but what about the S&W?