When I got my 110 338LM FCP, I made sure to use blue thread lock on the rail threads. Was at sisters place this past weekend shooting steel at 500 yards. Shot about 50 rounds. Rail became loose. Came home today, removed my scope and found all 4 screws were loose. Snuuged them up, took one out at a time to clean threads and reapply blue thread lock and tighten them again. Is there something better than blue thread lock? Don't want to use the red thread lock. I know the recoil is pretty stout but didn't think all 4 rail screws would break loose. Suggestions?