So I'm just a humble duck hunter who has a trusty 870 that has been recently failing to pull shells out of the barrel. I've shot a lot of rounds through it over the years and I am wondering if the hook that is supposed to grab the brass is worn out or if it can be adjusted. It seems to have a spring inside that could be part of the problem. Its not obviously rounded off and its not happening every time I shoot but one shot on a gun you expect to get a few from is not gonna be acceptable. I gotta figure out how to keep my go-to utility gun in service and pulling spent shells out normally. Any ideas? Thanks in advance.