A couple of things worth knowing about scope adjustments:
Back in the day when Dick Thomas was running Premier Reticles and it was the only other factory approved warranty and repair option other than Leupold for their scopes, he told me that the best approach for making adjustments that involved turning turrets counterclockwise (assuming RH threads) was to go past the intended setting by say 1 MOA and come back to it turning clockwise.
If you think about how scope adjustments work, any time that you are unscrewing a turret adjustment, you are hoping that the spring or springs will cause the erector tube to follow perfectly...and it may not. On the other hand if you are pushing the erector tube into the spring, the action is more positive.
A few years ago, I noticed a shooter that was having a lot of trouble sighting in two rifles with ancient 3x9 Leupold hunting scopes. Getting good windage settings had had him chasing his tail for a large number of rounds. After I explained this method to him, taking it to a bit of an extreme, he backed the windage out quite a ways and proceeded to march his bullet impacts toward the center. It worked and he was very happy.
Another thing worth doing from time to time is what I call exercising your turrets, carefully taking your windage and elevation adjustments to the ends of their range of adjustments, several times before returning them to the rifle's zero. Some time back there was an excellent article in Precision Shooting magazine that demonstrated that adjustments can be improved by this method. Some time after that when a shooter was having scope trouble at a match, I suggested that he try that. He did, and went on to win a yardage with that same scope.