Thread: Bore Sighters - any good?

Originally Posted by Grotto

I don't think I can do this on most of my rifles which are semi-auto, but would work on the bolt action ones.
Sounds like the laser is a waste of time, I'll just use a few more rounds and do it manually. Never takes more than 6 or so shots.

What's the gadgetman method?

Thanks

gadgeman method is as per his posting - the eyeometer method. Sika stalker has done a good job of explaining.
Otherwise, if you have an auto fire one shot at 25 yards. Use a reasonable sized backing board just in case you are miles out - if you are there may be a problem looming. Assuming you hit at 25 yards then holding your rifle really secure aim at your aiming mark again and then without moving the weapon adjust your scope cross hair to the bullet hole. Assuming your rifle has some grouping ability you are underway and can go to 100 yards. Or if anal fire one more at 25 yards. I boresight at home and then shoot @ 100yds no pissing around at the closer ranges - saves ammo.
Typically for say a 308 shooting 150grs and scope 1.5 centre to bore centre you should hit at 25 yards ~ 0.8" (20mm) low to be on at 100 yards.

I use a Leupold boresighter myself, use the graduations on the guage to determine height from middle of objective lens to top of barrel. Put boresight on end of barrel ( magnetic ) at the height you measured and turn on. Look through scope and you will see a small illuminated graph with cross hairs for you to align your scope cross hairs to. I used mine today to bore sight a weaver 4x scope ona P14, first shot at 100 meters was spot on for height and 30mm to right of bull
Google Leupold boresight and see if its what you want.