On the subject of scope adjustment....
The late Dick Thomas of Premier Reticles told me that it is always a good idea to go past the intended adjustment point by a few clicks, and then come back to the intended adjustment, when making an adjustment that requires turning either turret knob in a COUNTERCLOCKWISE direction. This would not be the case if the adjustment requires turning clockwise. The reason for this is that when you are turning counterclockwise (with a RH thread) you are backing the adjustment contact point away from the erector tube, and depending on the leaf spring that opposes it to move the erector tube. By going farther than the intended adjustment, and then coming back to the desired point of adjustment you will be pushing the tube directly. Bottom line, you should always go to your final point of adjustment with a clockwise turn of the turret knob. There is no need to go past when the desired direction of adjustment is clockwise.
Another adjustment complication comes from the relationship between the width of the contact points of the trurrets, where they touch the erector tube, and the fact that they are resting on a cylindrical surface (the erector tube). If the center of the erector tube is not close to coaxial with the longitudinal axis of the scope, and the amount of adjustment is of large enough magnitude, there may be a crossover such that an adjustment to elevation will also cause a change in windage, and vice versa. Weaver's Micro-Track system and Sightron's ExactTract system are both designed to get around problems in this area.
