Bore sighting


March 10, 2012, 12:20 PM
I Bore sighted my AR twice with a laser boresighter, "remington". And although I can get it pretty darn close with the iron sights, the red dot, "even on the lowest brightness", Is almost impossible to see the red laser dot from the bore sighter. Any tips. I did it at dusk last night , I see the laser when looking over the gun, but as soon as I look through the red dot, I loose it. I did get a few sightings and it was close to the recticle. I guess I have to get it on paper to tune it in any better. Any other suggestions? I used trees from 50 to 150 ft in my yard. It seems to be set to the 50yard the best. I am fairlly sure I would hit whatever I was pointing it at, just maybe a little left low. Also I can't see the top of the front sight at night, although I can see the dot from the laser is ligned up dead on it. It overides the sight post.

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March 10, 2012, 12:22 PM
Throw away the laser bore sighter and look through the hole in the barrel.

Works for me.

Whatever method you use isn't going to be perfectly sighted in anyway.
To do that, you have to shoot it.


March 10, 2012, 12:29 PM
rcmodel has a valid point. Use the bore sight to get you on paper but u gotta shoot it to fine tune. Looking down the bore while your upper is braced works about as good as anything. If this thread was about, "should I buy a laser bore sighter" the majority of the replays would have been 'No" you do not need one.

Old krow
March 10, 2012, 12:43 PM
Throw away the laser bore sighter and look through the hole in the barrel.

I use this method on some of my guns. It would take a little more finesse to make it work with an AR I'm sure, but I have never tried it. Bracing the upper like Sky is talking about would work. I prefer painter's paper personally. You can cut a 3x3 target and it's cheap. You can use it for painting to, or at least that's what I keep hearing.

If you're going to use the lazer bore sight, I'd aim for 25 yards, then use paper targets to do the rest.

March 10, 2012, 01:26 PM
Any suggestions on how to do this on a semi automatic without a boresight? I will follow up with targets after geting close with a boresight.

March 10, 2012, 01:35 PM
Well, with an AR-15, you take the upper off and take the bolt carrier out.

Then sandbag it, or cut v-notches in a cardboard box to hold the upper in one place long enough to look through the bore and dial in the sight settings at something 100 yards or so away.

With other semi-autos you can't look through?
I just use a ruler, and a 25 yard target.

Benchrest one shot.
Go measure the bullet hole and find out how far it is from the aiming point.

Then do the math on your 1/4", or whatever clicks on the optic x 4 for the 100 yard distance and change them that much.

The next shot should be very close to the aiming point.
If it isn't, measure again with the ruler.

If it's 2" low and 2 1/2" right?

Come up 8 clicks and left 12 clicks.

The next shot should be dead center.


March 10, 2012, 05:48 PM
Will do, that makes more sense. The bore sighter was a big 15 bucks so I thought it was worth a try. They burn through batteries like mad, last maybe 15 minutes.I got a great new handgrip "UTG" on amazon for like 17 dollars, It's the ergo, has a lump on one side so only your first digit fits in the trigger, and a thumb rest on the other, and the nice grippy rubber with finger grooves for the other 3 fingers. Makes for a much more comfortable grip than stock, and cheap.
I found amazon has some very cheap accesories for ar's . I wouldn't buy my optics from them, but they have most companys stuff cheaper than anyware else. If you use their credit card just once, they throw you $40 bucks. I used it, paid it off then threw it out. Hey it's free money, Paid for a few little additions.

dagger dog
March 10, 2012, 06:28 PM
If you want to continue with the laser, get some of those reflective thumbtack trail markers from your local Wallys World. You can arrange them in a five on a die pattern, that comes out to be about 1". When the laser hits that you WILL be able to see it .

I've found that 50 yds. works very well, even in bright sunlight, then you can get MOGA (minute of gnats a**) when you shoot it in..

March 10, 2012, 08:42 PM
Throw away the laser bore sighter and look through the hole in the barrel.

Works for me.
Same here, and it worked for decades before I learned it.

Old Dog Man
March 11, 2012, 01:55 AM
I bought one several years back. To use on pumps and autos, when inserted in bore I got to wondering how accurate the bore sighter was. So I rotated it in the bore (plastic spud) my target was about 15yrds. it made a 12" dia. circle around the 1" dot. I called the manf. and asked them just where I was supposed to bore sight on that circle. They told me to send it back and they would fix it. About 6 mo. later I called and asked about my bore sighter. They couldn't find it at first but finally came up with it and sent it back. I had to adjust it myself and got it to about 2". I just rotate it around the dot, center it up and go with that. Bolt guns and AR's I look through the bore and adjust the crosshairs to that, it will be on paper at 25yrd's and thats where I recommend the customerr starts sighting in. Saves lots of ammo. Al

March 11, 2012, 02:44 PM
Throw away the laser bore sighter and look through the hole in the barrel.

Or just use a bigger target.

All you need to zero any rifle is a single hole in the target. I've never found that any of the bore sight tools have ever saved me a single shot in getting my guns zeroed.

Looking through the bore usually gets me within 2" or so at 50 yards with the first shot, about the same as a bore sight tool. After that it is a simple matter of determining how far from zero you are and adjusting the sights. The 2nd shot should be zeroed at 50 yards. You can then move to 100 fire 1 more shot, measure and readjust. Shot #3 should have you zeroed at 100 yards.

If you cannot, or don't want to look through the bore just use a very large target, and move it to 25 yards if necessary. If your 1st shot hits, even if it is 2 feet or more from zero you can still measure the distance from zero and adjust your sights accordingly. It might take 1 more shot this way, but it I have never needed to do so.

March 11, 2012, 04:42 PM
Shoot one round from a solid rest. aim at the exact same aiming point and adjust the crosshairs or red dot to cover the point of impact of the first round. fire again you should be right on or very close.

March 11, 2012, 05:17 PM
Xyrfiter is spot on.

I’ve used this method for a couple decades now, and after two rounds, if you have done it correctly, you are there. The key is a solid bench rest and being able to secure the weapon to where it won’t move while you make the scope adjustments.

Before I learned this trick, I probably made a mistake in my mental math, or turned the adjustment on the scope the wrong way and I could spend considerable time, and rounds, achieving what can be achieved with just two rounds and a few minutes.


March 11, 2012, 08:47 PM
don't track bullits. they are right aim same every time. after zero try kentucky windage.

March 11, 2012, 08:53 PM
Make group holding same spot. then adjust scope. 1 shot nutin,2 group

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