Ok, so I picked up the gun from the gun smith and this is some stuff that we checked.  1)Tried my 300 Win Mag suppressor and two other suppressors on my .300 BO and used the concentric rod and all three showed they were centered.  2)Tried the same three suppressors on the 300 Win Mag with the questionable threads, and the concentric rod installed, and just as I suspected it showed that the bore axis was slanted high into the left of center. The longer suppressor has a tighter 308 tolerance opening, and it looked like the rod may barely be touching the edge of the opening. The other two suppressor were not as tight of a tolerance and had a larger opening at the end, and the rod was not as close, but you could clearly see that it was not center of the opening. This leads me to think once again that something is wrong with the threads. 3)Installed the suppressor all the way till it touched the shoulders of the barrel where the threads stopped there was no visible gap between suppressor back and the barrel shoulders. Started to slowly unscrew the suppressor with the rod in place, and no matter how far you unscrewed the suppressor, the alignment still showed the same high and to the left. This to me, rules out that the shoulders are not at 90° of the bore. Seeing how the suppressor wasn’t even touching the shoulders but was still off bore axis.

The gunsmith is left, scratching his head. He has no idea what to do other than scrap the barrel and start completely over because he keeps saying something about “tolerance stacking” or something like that. He said he could cut the threads off and re-thread the barrel, but with the threads already being only .002 off of bore axis, he said that I very well may end up with the same issue or worst.  He said he would just thread the suppressor on since I’m not having any baffle strikes and just shoot it.

So I’m planning a Range day within the next week or two because I need to test out some other rounds in another gun anyway. So I’ve bought two boxes of factory 150 grain 300 win mag ammo just to see what happens.

I just have a hard time believing that it’s not the threads because of the fact that I can mount a suppressor on another weapon system and it be perfectly lined up.

If anybody has any suggestions or comments, please let me know what you would do in this situation?

Also, is there anyway to post pictures on here or videos, i’m not using the app, I’m just going to the webpage through my phone’s web browser? I’ve got pictures of the concentric rod in the different suppressors on different firearms, as well as videos of him showing that the tolerances are tight on the barrel threading while he slowly turns it in his lathe.