Like all Lead Sleds, you must hold your rifle against the rest in a consistent manner to achieve the best accuracy. Varying the tension you put into the Lead Sled will change the point of bullet impact. Use the adjustments provided to achieve precise aim. Do not "bear down" on the Lead Sled to center the crosshairs exactly on the target, as this will affect the point of impact and increase your group size. We prefer to set the adjustable rear foot at approximately the correct height and then make our final elevation adjustments using the front elevation ram. Simply slide the rear of the Lead Sled Plus on the shooting bench to adjust windage.