Ok, I'm trying to drop one of these inyo a Bell and Carlson Medalist stock and am having issues. I get it installed, but when I close the bolt, the trigger won't move. If I loosen the action screw, it eventually (within five shots) work it's way out of the screw hole. What the hell is going on? Yes, I have the right stock because I already got the wrong one and had to get it replaced. I'd really appreciate some help with this. It's driving me nuts.