First suspect is the scope or...... mounts. How is it mounted?

After you eliminate any funny business with the scope and or mounts place the rifle in a gun vice. Check your adjustments on a piece of graph paper. See if it is crooked on the gun. Part of owning good optics means making sure they are straigh with the gun. Find out how many minutes of windage and elevation are built in. If you are all the way against one side with the adjustments you have found the problem. Remove the scope and using the simple cut two "V" in a box method re-center the cross hairs if you stck it back on the rifle and it is off as far as it appears to be your mounts are crooked.

Muzzle crown. The gun smith should have caught it if it was bad but I have seen muzzle damage do some crazy things. The problem may just require a new crown.