Originally Posted by
Deadshot2
Heating/cooling cycles are notorious for loosening any threaded device unless it's under a lot of tension. Expansion when fired (albeit very little, there still is some) also contributes to this possibility.
Might be a good idea that when you torque the barrel nut you put a "witness mark" across the nut, extending a short amount onto action and barrel so you can just glance at it to see if it matches up on both ends. If not, nut/barrel is loose. A black sharpie for stainless finish and a Silver marking pen for a setup that is a darker finish. If you torqued it, put the line from barrel to action, and all lines up, your GTG.
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