They are good, but with those eccentric ring inserts it is tricky and time consuming to zero. I did that on a Mexican Mauser sporter I picked up that had been drilled and tapped, had a picatinny rail and did not want that so went with some individual bases then Leupold scope, cannot remember which model at the moment, but did not have enough adjustment in the scope to bore sight it. One set of holes was not aligned with the other so the scope sat tilted to one side and slightly canted. My gunsmith modified one set of bases so that the rings aligned much better but not perfect and that is when I got a set of the Burris XTR rings and some of the eccentric inserts. using them I actually bore sighted it or rather using a laser sighter adjusted the scope after recentering the reticule.Check if Burris males an offset one piece mount with their XTR insert system. You would just need a dovetail to picatinny adapter.
Also check what Eagle Vision has.
For an airgun, a Diana 54 pro sport that shot to one side and low, again could not zero the scope, I got a set of sportsmatch adjustable rings, the two piece model. I tried a one piece set on another gun and it is more difficult to adjust, but with either it takes time and a lot of little adjustments.
Upvote 0