I have a Z6 2.5-15x44. Its 4.6 mils of elevation adjustment on the BT turret takes me to about 750 yards on my rifle. It's been spot-on and very reliable for me at ranges from 250 yards to 750 yards and between. The two downsides to the Swaro BT turret, in my opinion, are the limited adjustment range and soft clicks. Other than that, everything else works well, and it certainly has the outstanding optical qualities that Swarovski is know for.