I have a Browning Buckmark that on occasion will fail to chamber properly on occasion. I discovered that the front and rear sight base screws had worked themselves loose. I removed the screws and cleaned it up with ed's red and put some blue threadlock on the screws.
No problems for a while, then it started acting up again. Screws had worked loose even with the blue threadlock. I think I'm gonna try red threadlock and see if that holds.
Any Buckmark shooters here that have had this experience? How did you solve?