Bore sighting your own gun... Do any of you do it ?

Discussion in 'General Firearm Discussion' started by glockguy, Nov 1, 2009.

  1. glockguy

    glockguy Well-Known Member

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    So I got my new AR last weekend Got a scope had it put on and had it bore sighted.. Well long story short the guy who mounted the scope did not tighten it down very much and it pretty much slide off the rail.. So anyways I figured Id Get a bore sight and do it myself...do any of you do this or have luck with it? I found this one online...

    wat do you think?

    http://www.bhphotovideo.com/c/product/421468-REG/Bushnell_740100C_Laser_Bore_Sighter.html

    or something like this?

    http://www.opticsbestbuy.com/SIGHTMARK-223-Laser-Bore-Sight.html?feed=Froogle
  2. deadeye

    deadeye Moderator Staff Member

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    Spend a few more bucks and get the Leupold. This style is magnetic and has scale for zeroing as seen through scope. This allows to take scope off and put back on using same numbers. You can log numbers for reference when using various loads.
  3. TonsOfOregonBrass

    TonsOfOregonBrass Active Member

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    There are a couple problems with laser bore sighting.

    1) they are very difficult to see during the day. you have to sight in around dusk.

    2) they do not account for bullet drop. with 223 this isnt too much of a problem.

    that being said, i use one. I just get set up at dusk. set my target at the distance i want to shoot sight in, and if need be go into dark so i can see the laser well enough. then the next day go back and finish sighting in.

    I prefer the case style laser. that way there is no chance of the laser being at a slight angle.

    i also have to agree with getting a leupold.
  4. glockguy

    glockguy Well-Known Member

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    Do you have a specific leupold One in mind?
  5. NoAim

    NoAim Member

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    1) Pull the upper off the lower and remove the bolt and carrier
    2) Place upper on stable surface pointed at something unique and recognizable some distance away.
    3) Sight down the barrel at this object/place and remember it.
    4) Without moving the upper sight through and adjust your scope crosshairs/dot until they are centered on the same spot.

    Tada, you're boresighted enough to be on paper at 50 yards....for free.
  6. BillM

    BillM Bronze Supporter Bronze Supporter

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    I've got an old Bushnell. Uses an expandable spud, works---sorta OK.
    It will get me on paper at 25 yds every time.



    If you have something at distance you can use as a sighting point, do it
    the old fashioned way. Pull the upper off of your AR. Take out the
    BCG so you can look through the barrel from the rear. Figure a way to
    secure the upper so it won't move. I use a cardboard box with a couple
    of notches in it. You can use sandbags, a stack of books, whatever.

    Look through the bore and nudge the barrel around until you see your
    "target" centered in the bore. Without moving the barrel, adjust the
    scope until the crosshairs are centered on the target.

    Done. As good as any bore sighter, and a LOT cheaper.
  7. 56kninja

    56kninja Member

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    edit: I had bad information :laugh: thanks BillM
  8. BillM

    BillM Bronze Supporter Bronze Supporter

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    NO. NO. and NO again! They do NOT "rise, arch, and then drop." As soon as
    they leave the muzzle they drop. There is no anti-gravity. It's an illusion based on the barrel pointing UP in relation to the line of the sights.

    OK--rant mode off.:)
  9. TonsOfOregonBrass

    TonsOfOregonBrass Active Member

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    I don't know about this, i have seen wanted. And Angelina and that other weird looking guy could make bullets curve. so that basically blows your argument out of the water.

    Just kidding, that was such a lame movie.
  10. torpedoman

    torpedoman Member

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    at 25 yds the bullet is rising to get in line with the scope which is mounted higher than the bore because the rifle is pointed slightly up to compensate for the inch or more difference between the bore and the scope. Yes I use a laser to bore sight and the "target" you get wiyh the kit explains all the differences and is marker at different points and the marks are labled for diference scope mount heights. you will pay for the laser in ammo savings.
  11. dario541

    dario541 Member

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    While working at a gun dealer, I did a lot of bore-sighting using a Collimator. A number of times people would tell me later that the sights were "right on." I believe that Bi-Mart will sight in you guns at NO Charge even if you didn't purchase the gun and/or scope from them!
  12. glockguy

    glockguy Well-Known Member

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    Bi mart will yet but for some reason they cant do AR 15's
  13. Gunner3456

    Gunner3456 Well-Known Member

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    Geez, I used to think that was the only way to do it. With a bolt action, remove the bolt. If the gun is an auto and has iron sights, use those. Whatever it takes to get onto paper. Laser sighting and other methods aren't perfect either because we all know that the bullet and barrel will have a mind of their own when actually shot. You'll still have to fine tune it.

    $.02
  14. eldbillbo

    eldbillbo Bronze Supporter Bronze Supporter

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    +1 although i have the bore lazer i still do it this way i just take somthing like a match book cover and place it about 25 feet center it in the bore then center the cross hairs on it and that puts it on the paper this also works with bolt actions by removing the bolt
  15. cameronhu

    cameronhu Member

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    I picked up a laser bore sight a while back. Didn't work at all. I ended up just using _very_ large targets and worked my way in.
  16. pioneer461

    pioneer461 Active Member

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    It's not complicated, and some of the gadgets and gimicks you can buy can be a waste of money. Open the action, put the rifle in a rest or vice and point it toward an object 100 or so yards away. Bring the sights, or reticle to where they match up with the object the bore is actually pointed at. Lock it down, and vio'la, your're bore sighted. Next, take it to the range and you will be hitting on paper, so you can dial in the scope of sights to "zero" the gun. With practice, you can get pretty good at lining them up and require little or no zeroing.

    I learned how to bore sight jet fighters in the Navy.