Bore sighting question/methods

Discussion in 'Long Range Scopes and Other Optics' started by CjC73, Jul 23, 2018.

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  1. CjC73

    CjC73 Well-Known Member

    Jan 21, 2018
    would like to get a good bore sighter without spending hundreds of $$$. Is there a decent one that will handle all calibers?

    Or what method do others use?

    I did get an old Bushnell bore sighter from a buddy's dad. has the arbors for different calibers (there's 3, although I cannot figure out how to swap them out). Nor can I figure out how to verify if the plastic housing on top (with the cross hairs for sighting) is level with respect to the horizontal once inserted into the muzzle.

  2. Andrew Massi

    Andrew Massi Active Member

    Jun 4, 2018
    I use a free one
    Post a large circle target @ 25 yards
    Pull bolt and center bore on bullseye
    Move crosshairs to bullseye
    Replace Bolt
    Fire 1 round
    Move crosshairs to poi
    Fire 2nd round, normally through the bullseye
    Move target to 100 yards and zero scope

    If you have a new barrel and are doing the 2 box fire/clean break in wait to zero until after your done with break in

    The only thing this doesnt work on is semi autos like a bar or 760, 10/22

    I also have a target dot on my garage door behind my plumb line so I normally bore sight after scope mount since everything is nice and squared
    esshup, Gwine, bob4 and 2 others like this.
  3. surgeon260

    surgeon260 Well-Known Member

    Dec 18, 2017
    ^^^^ This.
    esshup likes this.
  4. J E Custom

    J E Custom Well-Known Member

    Jul 29, 2004
    I also look through the bore when possible. I use a pistol target with a 6'' black bulls eye at 100 yards and center the bore over the target.

    I use my lead sled to hold the rifle steady and when the bore is centered, then I adjust the scope. After adjusting, I look through the bore again and without touching the rifle I look through the scope. If there are any minor adjustments that need making, I repeat the process.

    Normally I am within 1 or 2 inches of dead center. And then fire on a target that has a 1/4 MOA grid for fine tuning.

    For non bolt action rifles and pistols I use this type of bore site because it will fit everything and has no pilots that can damage the bore/crown. (It is a great tool that is very handy).

    I recommend the green laser over the red because you can see it better outside. If using inside to site the scope in before going to the range, the red works fine. (and is a little cheaper)

    Last edited: Jul 23, 2018
  5. CjC73

    CjC73 Well-Known Member

    Jan 21, 2018
    thanks all. I was thinking that too, look down bore at target 25 - 50 yards away.

    Guess i'll do that next time I hit the range.
  6. cdherman

    cdherman Well-Known Member

    Aug 9, 2008
    Before you got to the the range, at night , you can also find a distant light if available in your neighborhood. Get things all steady with some sand bags, lead shot (I always still have a variety of lead shot in bags from my shotgun reloading days), and bore sight to the light. Optimal is a light that does NOT fill the whole bore and is around 100 yrds...

    Then adjust the scope to also center on the light. You will arrive at the range already close to sighted. Start at 50yrds and a large target.....

    Other advantage to this approach. It really allows use of Burris signature ring inserts. You can, if desired, center the scope crosshairs in the middle R to L. And move the Up Down to the bottom , then raise it a couple M or inches. Now, if you are really patient, you can use the ring inserts to rotate the scope into allignment. So that long range elevation adjustments put the crosshairs into the sweet spot of the scope optics.

    Hope that makes sense....
  7. bob4

    bob4 Well-Known Member

    Nov 10, 2012
    Looking through the bore on a bolt rifle is so simple not to do.
    Rich Coyle and Hatrick like this.
  8. Hatrick

    Hatrick Well-Known Member

    Sep 15, 2016
    I do this every trip to the range. Something about being taught about barrel obstruction. Do this enough and you will know where the crosshair belongs and you will be able to check in camp when firing a rifle is not wanted. (Up on the mountain)
  9. Laelkhunter

    Laelkhunter Well-Known Member

    Oct 20, 2011
    If you have a deprimed case, you can insert it in the chamber, and by looking through the flash hole instead of the whole chamber and bore, you can get a more precise aiming point.
  10. Rich Coyle

    Rich Coyle Well-Known Member

    Aug 14, 2013
  11. CjC73

    CjC73 Well-Known Member

    Jan 21, 2018
    going to try this next time I go out. thanks
  12. kiwikid

    kiwikid Well-Known Member

    Oct 21, 2012
    About the best thing I have found to line up on through the bore of a rifle is a vehicle hubcap or wheel trim. At 100 yards they tend to fill the bore nicely and then it is simple to alter the scope to the center of it.
    Last edited: Aug 4, 2018
  13. walter crouse

    walter crouse Active Member

    Jun 9, 2012
    I have the old Bushnell bore sighter and it works great. The flat spot on the arbor is the set the clamp screw. I set the cross hairs on the center and you are set