Quote Originally Posted by J.Baker View Post
Using the method Ted descibes above of pulling the bolt and looking through the bore is much, much more effective and I've gotten so good at it these days that the POI of my first shot is usually within 3-4 inches of my aiming point at 100 yards. Only downside of this method is it really only works on bolt-actions and AR's - and on the AR's you have to pull the upper receiver off the lower and remove the BCG to do it.
I haven't had a rifle "professionally bore sighted" since the late 70s. The only method I use is the one Ted described, and like JB, am usually within the same 3 - 4" at 100yds using my rifle's barrel and my own eyes.