Is it the full sized 22 or the compact? I had a full sized a couple years ago. It would only feed reliably on CCI Target. Every other brand I tried it would jam. A co-worker offered to buy it off me and I sold it to him. I think he did replace some springs, and bought all the CCI he could find.
You got good advice already, call S&W, tell them what's going on. If they work on it, ask for a list of all brands of ammo they use.