I have an SX3. I've hunted here in Quebec 34 days so far this season without it jamming up on me. I have two friends that also hunt quite a bit with SX-3's and haven't had a problem either.

I know one guy who had a problem when he first bought his gun. He took it straight out to the range without cleaning the gun, and the action jammed up on him. It took him a long time and many cleanings to get the gun working properly... but it works just fine for him.

Good luck