Beg or borrow a cleaning rack or shooting sled - something that will hold your rifle perfectly steady on the shooting bench. Take out the bolt and sight through the barrel at a basketball sized target 100 yds away. Center the target within the bore of the rifle. Now, without touching the rifle, look through the scope and see where the crosshairs are. Move the reticle adjustments until the crosshairs are just below the center of the target (you have to move them backwards from the markings on the scope - i.e. to move the reticle up use the direction for down).
If you cannot do that and get the crosshairs lined up under the actual view of the target as seen through the bore then you've got a bad scope.