I just bought a 10-22 with a Green Mountain target barrel with a match chamber. This is my first voyage with a match chamber in a 22LR Semi-Auto. I am assuming that I might have a functioning problem with some ammo. I added a Titanium extractor to assist in extraction. I am looking for high velocity hunting ammo. Any recomendations? Anybody with any 10-22 experience, and a tight chamber? I would like to be able to shoot Velocitor. Anybody have any experience with it. Tom.