I am using barrel keys on a new rifle. Four of them. Despite my best efforts, they were all too tight to start with and, after some very, very careful adjustment, all of them are looser than I would like (i.e. they push out far too easily). It seems like bending them slightly, or peening the loops tighter, will only work until they wear in and get loose again. Is there some trick to fitting barrel keys I am missing?
Thanks