I grew up shooting rifles and shotguns but haven't ever shot handguns with any degree of seriousness. I recently bought a Ruger GP-100 chambered to .357. After a few trips to the range, I realized I should have bought a .22 handgun to go with it so I'm not spending $50 every time I go to the range. Does anybody have a recommendation for a reliable handgun chambered to .22? I am principally looking for a revolver, but would consider an exceptional automatic. I just want something simple that I can practice fundamentals with and not break the bank. Preferably, I'd like something for less than $500.