I have often noticed the tubes not tight on one or another of my guns while hunting, and I could see where there had been obvious gas leakage. I was thinking about using some Loctite on the threads, but concluded it must not be a big deal beacause nothing had ever been harmed, and I shoot the rompingest stompingest loads available when shooting at geese or pass shooting big ducks. I have even tightened the same tube more than once on a hunt using a quarter. Maybe I will use some Loctite - cheaper than a replacement tube.
