Originally Posted By: varminter .223I might try it on my 6x6.8 or my stag model 6 just to back up the fact it isn't the rifle. I would do the opposite. I would put a glass scope on the same gun. If you shoot in varying temp conditions, at the same distance, with the same gun, and with the same ammo as your thermal scope, you have totally proved it is either the scope or the mount of the scope. Adding a 2nd gun may be helpful but if it doesn't shoot, then you are back to you should test a glass scope on that gun. Temp plays a factor on more things than just thermals. Barrels, ammo, stocks, etc can all be impacted by changes in temp. This is why you want to keep all the variables as close to the same as possible and take the thermal out of the equation and replace it with a glass scope.
I have had times where I was sure it was the scope and putting a known glass scope on the rifle proved the issue was the scope and I have had it prove the issue was in the rifle/ammo/suppressor, etc.
If you put a glass scope on and the test confirms it truly is the scope and/or mount, and since you feel you have exhausted your options with Bering, I would contact your dealer to see if you can get a credit towards a different optic.
One more thing I don't know if I mentioned, but have you checked the tightness of the screws under the mount? I have only seen this one time before where this was the culprit, but it is worth checking if you haven't. If this was the culprit, I would anticipate the scope not grouping vs a shift, but check it in case.