Need help sighting in ACOG Scope

[Ripper]

Hi guys, I went to the range today with my SIG 556 and a new ACOG Scope. It is mounted on a LaRue LT 100 mount made for the ACOG. i WAS SHOOTING AT 100YDS. I was not even hitting a 2ftx2t target at all way off! I did not boresight it first did not think it would be that far off. I did not mess with the elevation or windage knobs at all did not know where to start,no holes on paper. Do I need to buy a laser bore sighter to get on paper or is anyone here know any secrets on how to get on the target and then I know where to start for fine tuning it. The ACOG is brand new and the mount is also. It is locked up tight on the rail no movement. Please advise. I have a grid type bore sighter that I use on my M1A and US OPTICS Scope but it doe not work with a ACOG on the SIG Rifle, different set up. Please any help would be good. Thanks Ripper

[SuperSet]

Try zeroing at 25y first and then walk it out to 50y and then..
you get the picture.

[buffybuster]

Is there a dirt berm that you can shoot into? Pick something that you can shoot at in the berm (ie: dirt clone, weed, etc) spot where your shot lands in relation to where you aimed. If you cannot see the impact in the FOV of your scope, chances are there probably isn't going to be enough adjustment in the scope to get it on target. It that case, it's good to have a spotter to tell you where the heck your rounds are landing.

If that is the situation, then shoot wth open sights to see if you have to make gross adjustments. If not, then there's something not right with your mount. Make sure the cross bolts are oriented correctly and everything is evenly tightened down. If that fails, go find someone who genuinely knows more than you and have them check everything over.

[aplinker]

Is there a dirt berm that you can shoot into? Pick something that you can shoot at in the berm (ie: dirt clone, weed, etc) spot where your shot lands in relation to where you aimed. If you cannot see the impact in the FOV of your scope, chances are there probably isn't going to be enough adjustment in the scope to get it on target. It that case, it's good to have a spotter to tell you where the heck your rounds are landing.

If that is the situation, then shoot wth open sights to see if you have to make gross adjustments. If not, then there's something not right with your mount. Make sure the cross bolts are oriented correctly and everything is evenly tightened down. If that fails, go find someone who genuinely knows more than you and have them check everything over.

Berm, ground, whatever... shoot and move the poof until you're on target.

It's easy.

If you want to "bore sight" it, open it up, put the barrel on something sturdy that won't move. Now, pull the BCG and, looking through the barrel, point it at something in the distance that's easy to see. Without moving the rifle, adjust the ACOG to be on target at the same thing.

[hoffman259]

I just sighted my acog in with a laser bore sighter. I am going to be going to burro next weekend and can bring it with me if you want to use it.

[Jicko]

If you want to "bore sight" it, open it up, put the barrel on something sturdy that won't move. Now, pull the BCG and, looking through the barrel, point it at something in the distance that's easy to see. Without moving the rifle, adjust the ACOG to be on target at the same thing.

+1 this is super easy to do, and had get me on 99% of the time.

It works for ARs and also with a bolt-action rifles.

[SJgunguy24]

Berm, ground, whatever... shoot and move the poof until you're on target.

It's easy.

If you want to "bore sight" it, open it up, put the barrel on something sturdy that won't move. Now, pull the BCG and, looking through the barrel, point it at something in the distance that's easy to see. Without moving the rifle, adjust the ACOG to be on target at the same thing.

Yep, give this a try. Just finished my AR on Friday. I had an old scope laying around so I slapped it on the Flat Top and looked through the bore. Saw the same picture.

I shot it on Sunday, 5" high and 6" to the left, had it dialed in with 9 rounds. Very cool indeed.