Originally Posted by osoh
Are your rifles bolt actions? If they are, Just for the heck of it, take the bolt out and hang a shiny pie plate or something up a 100 yards out, now that the bolt is out glance down through the barrel from the back of course, and see if you can see your shinny target. If you can then get something to stabilize the rifle a little be it sand bags or a gun vise in order to hold your gun solid then try to look through and get the shiny target centered in your view again looking through the barrel. Once centered have another person adjust the turrets until the cross hairs are on your shinny target. Glance back and forth to see if both look spot on. If this is the case you will end up within inches of a perfect shot at 100 yards (if thats where you hung your shinny target) After a while you will be able to do this real fast aiming at a sign, pine branch, target face whatever that you have out about 100 yards to get your scope close for sighting in at 100 for zero. No gadgets and fast plus its just better knowing you did it yourself. Cheers oneshot.onehit
I agree. I think laser boresighters are just a gimmick. Sighting down the barrel, if your rifle allows it, is actually just as convenient. The best use for a laser boresighter is to tease cats.
When I'm running scope clinics at the range, I use a boresight collimator for convenience, but it's no more accurate than the method described above. A boresight collimator has a dozen uses, other than zeroing sights.
Also be aware that barrel vibration can throw shots away from boresight. Aiming errors of 4-6" are common, but I've seen 10" or more, causing shots to miss paper at 100 yds. Barrel vibration is especially bad in lightweight factory barrels on magnum rifles. It's a good idea to fire your first shot at 50 yds to make sure it's on paper.