Beagle's correct and may be I can elaborate on that.
Find the optical center by spinning the scope in the rings and sighting thru the scope while watching the cross hairs. Adjust the turrets until the scope hairs remain centered as you spin the scope - you should then have the recital in the optical center. Mount the scope on the rifle and see were it groups. If its way off, swap the rings end to end and recheck. Still way off rotate one of the scope rings as often the rings clamp from one side and depending on the width of the rail the rings will be off center. Keep switching them around until you get the closest POI to the line of sight of the scope and if it is not to far adjust with the turret. If it is still too far off you can shim between the rail and ring - at the dovetail to move the center of the ring over. I have used brass material purchased from the hobby shop.
Shooters who participate in Field Target set their scopes up for the POI to be on target at 55 yards with the scope very close to the optical center. Usually there is a need to shim under the rear scope ring to get enough down tilt in the scope to achieve this in the elevation - but if done incorrectly can damage the scope. Or the ring is recut using a mill to relocate the rings center or you can purchase droop barrel scope mounts that compensate for this. Keep in mind that the torque at the rings, where the scope attaches to the ring mount, is not very much - maybe 10 in-lbs or less - it's a lot less than you think - check your instructions. That means if you take a 10 pound weight and attach it on your allen wrench 1 inch out from the center of rotation, that would develop the required torque.
That was probably a bit long winded and more than you wanted to know - good luck.
Edit - you guys are fast on the keys!