As for the reliability of the Ruger 22/45 it is about mid-range, being a .22 and an autoloader. And you will want to stay away from hollow points if possible, they don't feed as reliably. It is mainly a practice gun, and .22 semi autos are not noted for their reliability. But here is one really cool thing about the Ruger 22/45, as long as you keep it reasonably clean, the more rounds you shoot through it, the less it will jam on you, the gun just functions more smoothly over time.
You can buy the Ruger 22/45 on Gunbroker.com