The screw on mine was pretty darn tight, but I wanted to take it down to lube before first firing. So a squirt of liquid wrench, wait 15 min, then apply gradually increasing pressure and it broke loose. Wrench is fine, screwhead fine, and threads show no damage. Wiped off the liquid wrench and now snug it up with as much force as I'm willing to use to take it out. Keep the wrench handy and snug it up from time to time when shooting if needed. I'm looking for a washer to put on there perhaps, but it seems to be staying snug during shooting for now.
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