I do. Here's how I sight in a bolt rifle. First, I ensure that all the mount and ring screws are tightened. Next, I remove the bolt, lay the rifle firm on sandbags, and look through the bore from the reciever end and center the target in the bore. without moving the rifle, now I look through the scope, and adjust until the crosshairs are also pointing at the target. Remember that your adjustments will be made backward from the directions on the scope at this point. This will get you on paper. Now, replace the bolt and fire a shot....fire a series of three shots to ensure that they are in a group. Now you can make final adjustments using the directions written on the scope. Fire three more shots to verify your zero. Once you have it where you want it, you are good to go. Anytime you change brands of ammo, or bullet weights or styles from the same brand, you'll need to check your zero again.