ORIGINAL: nksmfamjp
Bore sighting is a gimmick. You can bore sight by pulling the bolt out and comparing what you see there to what you see through the scope at 25 yards and do ok.
That's what I do. No big deal, use a large paper to shoot at. I never used a bore-sight tool. Just make sure you have a solid rest so the rifle doesn't move when you move to adjust the scope.