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Zeroing My SR-556

This is a discussion on Zeroing My SR-556 within the Ruger Semi-Auto forums, part of the Rifle & Shotgun Forum category; Hello I recently purchased a SR-556 with the Troy Flip up sights. At 25 Yards I cannot get it to shoot low enough for my ...


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Old March 20th, 2013, 02:34 PM   #1
 
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Zeroing My SR-556

Hello I recently purchased a SR-556 with the Troy Flip up sights.

At 25 Yards I cannot get it to shoot low enough for my liking. I would like to be at about an 1" 1/3 under point of aim. I am shooting approx 4 to 5 inches high at 25 yards.

The sights are maxed out and shooting as low as possible but centered. They are also in the position on the rail how they came from the factory.

I have been told by a Marine friend that perhaps by moving the front or rear sights forward or backward that I may be able to get the rifle to shoot where I want it to.

With the issues of obtaining ammo easily and the cost I would like to get this accomplished as quickly and with as few shots as possible.

I would appreciate you opinions on what to move and either forward or backward so I can adjust my sights to better suit my needs.

Any other zeroing tips for the SR-556 with the Troy flip sights would be greatly appreciated. Thanks for you help in this matter.



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Old March 20th, 2013, 03:27 PM   #2
 
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Correct me if I am wrong, I thing you are saying that the POI is 4 to 5 inches above the POA. Not sure which way your sights are maxed out so forgive me if this is redundant, but to lower the POI the front sight needs to be raised.

ZEROING PROCEDURES
1. Fire a group and measure from the point of aim to the point of impact.
2. Adjust the front sight for elevation only. Adjustments can be made with an AR-15
front sight tool, AK74/47 tool, or needle nose pliers.
3. Confirm zero with a group of aimed shots.
ADJUSTMENT
1. To move the bullet impact up – turn sight blade to the right/clockwise.
2. To move the bullet impact down – turn the sight blade to the left/counter clockwise.
1/8 Turn / 45 Deg = 1” shift at 100m 1/4" shift at 25m
1/4 Turn / 90 Deg = 2” shift at 100m 1/2" shift at 25m
1/2 Turn /180 Deg = 4” shift at 100m 1” shift at 25m
1 Turn /360 Deg = 8” shift at 100m 2” shift at 25m

Hope this helps.
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Old March 20th, 2013, 03:33 PM   #3
 
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Everything you have said is correct.

I am pretty familiar with sighting in weapons other THAN AR's so no disrespect is intended.

What I am trying to say is the way I am accustomed to there is no more way to lower the point of impact because the front post is all the way up.

With any other type of firearm I have had you always move the sight towards the point of impact and I cannot raise it any further. So it still shoots high.

Please tell me if I am not making sense. I am getting old 43
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Old March 20th, 2013, 03:37 PM   #4
 
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Quote:
Originally Posted by JETAV8R View Post
1. To move the bullet impact up – turn sight blade to the right/clockwise.
2. To move the bullet impact down – turn the sight blade to the left/counter clockwise.

Is this opposite of most other methods? I assume like most screws righty tighty so turning right would tighten the front post therefore lowering it?

Is that different in AR's

I mentioned this at the range to the range guy helping me as I have read it and he did not confirm it
I assumed loosing it turning left would raise it?

Is the sights threaded opposite of most things?

Thanks in advance.

That would sure make it a simple fix if it is that way.
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Old March 20th, 2013, 03:38 PM   #5
 
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How far was the POI vs. POA before the sights were adjusted?
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Old March 20th, 2013, 03:41 PM   #6
 
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My bad I do not remember and others were there offering advice and helping so i was not the one in control at the moment. My bad on that.
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Old March 20th, 2013, 03:42 PM   #7
 
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I adjusted it last and turned left to the max to raise the sight post.

But as you have mentioned it is opposite of what I have heard is the case.

After 3 hrs I had a slamming migraine and called it a night.
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Old March 20th, 2013, 03:44 PM   #8
 
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Quote:
Originally Posted by drumNgun View Post
How far was the POI vs. POA before the sights were adjusted?
High when I first shot
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Old March 20th, 2013, 03:55 PM   #9
 
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Well I don't think it would make a difference but just for reference on my 556FB. My front edge of my front sight is about 1.5" from where the gas regulator inserts. The back edge of my rear sight is about 1" from the charging handle. That's how the rifle came from factory.

How were you shooting the rifle (i.e. rest, sand bags, bipod, free-standing, etc.)?
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Old March 20th, 2013, 04:01 PM   #10
 
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a rest and seated at a table. I was shooting a pretty tight group, about an inch or so at 25 yards. just way high of point of aim.
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Old March 20th, 2013, 04:41 PM   #11
 
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My first outing I used the gun range's rest which was a block of plastic/resin. The rifle would bounce on that rest and I would end up shooting high. I never used their rest after that. I now either shoot from the bipod or unsupported.

You can invest in a laser bore sight to help get things roughly dialed in without having to go through that hard to find/afford .223/5.56 ammo.
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Old March 20th, 2013, 05:53 PM   #12
 
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Thanks for the help and advice drumNgun.

Still wondering about the clockwise / counter clockwise if any ole timers are out there?
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Old March 20th, 2013, 07:29 PM   #13
 
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Counter clockwise raises the front sight post therefore lowering the bullet impact on successive shots.
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Old March 21st, 2013, 05:38 AM   #14
 
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Quote:
Originally Posted by drumNgun View Post
Counter clockwise raises the front sight post therefore lowering the bullet impact on successive shots.
Does anyone disagree with this?

Is it the same with Troy flip up sights also?
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Old March 21st, 2013, 08:02 AM   #15
 
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Here is what you need to know:

TO LOWER THE POINT OF IMPACT:

RAISE THE FRONT SIGHT
and/or
LOWER THE REAR SIGHT.
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