@Mooseman l have had a suppressor for my 300 Wby Mag for over a decade & never had the problem ,they do recommend a light coat of oil is put on the muzzle thread before the suppressor is screwed on.As l take it this is a recent fitting, you may be best off getting in contact with DPT,as proper threading is critical as the suppressor needs to be snug against the thread shoulder & if your muzzle thread has no thread relief, this will cause tightening problems .
l have always found them good to deal with & they appreciate the feed back ,l was one of the first orders for a 270 WSM & they checked a few times & sent me a beanie for input .
I did a few Machine gun shoots with clients collections in the US & they would even just pre heat the suppressors in a oven & light oil threads ,put suppressor on with a welding glove & that was it for 100's of rounds .
Keep us updated will be interesting to hear what the solution is![]()
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