you can also laser bore sight it. You local shop should have the equipment to do it. Should not run very much $ to do it. If you chose the shoot then turn method. Make sure to put the weapon on a bag or bench weapon vise. So that you are getting the same point each time. Other wise you will run through a butt load of ammo trying to figure out why its all over the place.

Lot like having the same locking point with a bow. consistancy is the key. Good luck with the hunt.
