I have a threaded compensator on a 580 series. The unit came with a jam nut to keep it tight. It had been tight for several trips to the range, but last time out, the compensator started to rotate while I was unaware of why my groups were all over the place. I didn't notice it was loose till I got home and was cleaning the rifle. What is the best way to get a threaded compensator to hold tight, until and unless I want to take it off? I thought of blue Loctite, but I suspect the barrel can get hot enough to melt Loctite. What about some kind of washer between the jam nut and the compensator?