Once you are on paper, fire a group, if it is anywhere other then the bullseye put your crosshairs on the group/bullet hole and hold the rifle steady. Then adjust your crosshairs to be dead on the bulls eye. It is easier if you have someone help you, one of you hold the rifle steady, one turn the windage and elivation adjustments until the crosshairs have moved from the group/bullet hole to the bullseye, just ensure that you do not move the rifle during this process.