It's a good chance that their shim job placed torque on your scope tube,which can cause other problems.
You need to know if the scope is out of spec or your receiver or mounts are out of alignment. Out of alignment receiver holes need to be fixed with Burris inserts in signature rings which won't torque the scope tube,and no worries about shims moving either.
I can’t understand why I didn’t have shims or anything else when I had the Burris on there. They told me that they switched the rings that I had for Leupold rings.
You have to start doing all your own mounting. They may have installed the mounts wrong or they may have been out of spec from the start,or your receiver holes may be off and you didn't know it before. Hard to know without having the gun and starting at the start.
What style mounts are on your gun?
