Tactical turrets means finger adjustable height and windage knobs with the ability to reset them to zero after sighting in. The "BDC" bullet drop compensator is set for 100 to 600 yard range. If you frequently shoot further than 600 then set your cross hairs at like 500 yds and BDC will work to 1100 yds in theory. Nikon has a chart that will allow to to type in bullet grain, caliber etc to zero the scope.