Scope Issues

[RaiderNation]

Ok, I can not figure out how to zero in my set up. Hopefully someone can chime in and help me. I have a Delton standard flat top upper. The scope is a Leupold Mark AR 4x12 mounted on a Burris Perp 1" mount. So the problem that I am having is that I have adjusted the scope as far up as possible and still am shooting 3-4" low at 25 yards. At 100 yards the only way I was able to hit the target was from a ricochet up.

I have taken off the turret knob, set it back to zero and still have no more adjustments up. I have called Leupold and was told it maybe the mount? Burris says it maybe the upper out of spec or an issue with the scope? Delton told me that the scope or the barrel of the weapon could be the problem?

Before I start smashing up the scope, upper and mount does anyone have any ideas what I am doing wrong? Or what may be the problem?

[Veggie]

Are you using a good cheek weld with proper eye relief??

[acourvil]

Try fliping the mount 180 degrees and see what happens. If you are then shooting high, it's the mount. If you still have the same problem, it's probably your upper.

[thefinger]

3-4" low at 25yd should be just about right-on at 50yd and only a bit high at 100yd...

Details on your Del-ton upper?

[RaiderNation]

3-4" low at 25yd should be just about right-on at 50yd and only a bit high at 100yd...

Details on your Del-ton upper?

16" DEL-TON A3 profile 1:9 twist upper.

[RaiderNation]

Are you using a good cheek weld with proper eye relief??

Yes, three people including myself shot with same results.

[shadowofnight]

First thing I would do is actually center up your elevation and windage ...throw a cheap grid type bore sighter on...crank the elevation knob all the way down...remember spot on grid...crank all the way up...remember spot on grid...adjust elevation to be dead center between these 2 points. ( If you dont have one of the cheap grid type bore sighters you can get a rough estimate by just counting clicks....but with your cap being resetable...I would want to see the reticle move in both directions to center it up )

Do the same for windage

Now that your scope is dead center adjusted , pop the upper off...pull the bolt carrier out ...set it on bags to be steady and look through bore and scope to see how close their centers are....if they are nowhere near each other its your mount...work on getting your mount to get them pointing at the same spot while the scope is adjusted to dead center.

You shouldnt have to get them perfect because your scope has 55 MOA of adjustment for both elevation and windage....but get them as close as reasonably possible.

[IsaacGlass]

Most on the forum would frown on using a laser bore, but it beats wasting range time and guessing. I used one to check my optics setup the night before I would head on out to the range.

[Cobrafreak]

They also make adjustable scope mounts with independent height elevation adjustment for situation like this I suppose.

[DULLYJAY]

Try mounting the scope on a different rifle. If you don't have one, seen it to me. I'll check it out for you. No charge

[Mac]

So you are hitting the target at 25 yards.
Centered windage wise - right?
Rounds hit 3 to 4 inches low from your POA. (Crosshairs)

You looked at a ballistic chart for the 5.56 so you know where you want to hit - right. You know the distance from the bore ceterline to the center of your objective lens - right.

So how many clicks in elevation did you give the optic at 25 yards?
Assuming 1/2 MOA clicks for that scope.


You verified with a few more rounds at same distance and what was the result?

[1988]

Ok, I can not figure out how to zero in my set up. Hopefully someone can chime in and help me. I have a Delton standard flat top upper. The scope is a Leupold Mark AR 4x12 mounted on a Burris Perp 1" mount. So the problem that I am having is that I have adjusted the scope as far up as possible and still am shooting 3-4" low at 25 yards. At 100 yards the only way I was able to hit the target was from a ricochet up.

I have taken off the turret knob, set it back to zero and still have no more adjustments up. I have called Leupold and was told it maybe the mount? Burris says it maybe the upper out of spec or an issue with the scope? Delton told me that the scope or the barrel of the weapon could be the problem?

Before I start smashing up the scope, upper and mount does anyone have any ideas what I am doing wrong? Or what may be the problem?

Do you have a picture of your scope setup ?

[RaiderNation]

Thanks for the help guys. I made a trip to range on Saturday and figured out the problem. Seems to be an issue with the scope.

[L4D]

Thanks for the help guys. I made a trip to range on Saturday and figured out the problem. Seems to be an issue with the scope.

what kind of issue?

[RaiderNation]

what kind of issue?

I don't know the exact issue. But I do know the scope is broken. I used my friends scope with my mount and I was able to zero it on my weapon. Sucks that I have to send back a brand new scope.