Yes there are different methods, however the recomended method by all mfgrs that wont void any warranty is to rotate the scope in a V block and adjust the turrets until the crosshairs stay on center while rotating the scope 360 degrees. There are a number of scope mfgrs that may void a warranty if turrets are rotated all the way in any direction, the mfgr may call that abuse!! You can ask me how I learned that......In years past I have worked closely with repair centers at Burris and Leupold all the folks there higjly recomend against turning turrets all the way in any direction.