I have the 12BVSS in 223, same scope, EGW base, and I've tried a host of rings, now using Warne.
Vortex warns about over torquing scope ring screws, 15 to 18 in lbs is all they recommend. My vortex locked up at 20 in lbs. torque, fortunately I carry a torque wrench with me to the range and backed it off after remembering I'd read something about over torquing the Vortex.
Here's some reading that might help.https://vortexnation.wordpress.com/2...ur-riflescope/
I'd recommend you start by taking everything apart and recheck the base and screws. Install and torque the front base screw ONLY and confirm the base is tight on the action, and the screw is not bottoming out on the tenon threads and giving you a false torque reading. Then once you have the scope in the rings, tighten the screw torque to about 10 in lbs and visually verify that the elevation and windage turrets work throughout their entire range, then slowly creep up the torque while again verifying after you get to 15 in lbs. Bore sight it again at 100 yds and see if it's still-mis aligned. If it is, the Burris rings allow for adjusting out that error.
Here is another base that will allow for adjusting out windage errors while mounting.
https://www.opticsplanet.com/leupold...iece-base.html
The two screws on the rear mount allow you to move the rear ring left or right as you tighten it down.
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