I've shot probably 500 pellets through this. Had it for just under a year. I noticed the bolt was getting sticky to latch and unlatch (rotating it down into the catch). Now I cannot get the bolt handle to rotate into a locked/seated position no matter what. I cannot see any obstructions and the bolt seems to be going plenty far forward. I see no reason the handle shouldn't rotate into it's locked position. Any ideas? I am going to try to call about warranty service since I have a few days left but it seems like a very odd problem. I have no problem pulling the bolt back and cocking it or anything else. It simply won't rotate all the way down into the groove to lock.