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Old 02-22-2013, 08:13 PM   #1
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Default Zeroing an Eotech 512

I recently bought an Eotech 512 for my Bushmaster AR-15. I've read that it's recommended that it be zeroed at 50, or even 100 yards. My problem is that it's still below freezing where I live and all the outdoor ranges are closed and the indoor range I go to only goes out to 25 yards. I was hoping someone could help me figure out just where I'd want my shots to land on a target at 25 yards so that it would be zeroed at 50 or 100 yards. Thanks in advance.



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Old 02-22-2013, 08:21 PM   #2
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Buskowski,

Send us a photo of your rifle so we can see what sights you have on it and we can go from there! If you already have your Iron Sights Zeroed. At what range are they Zeroed. Then we can better instruct you. You may have the hard part out of the way already. I will share that with you if you can provide the above information. I have zeroed hundreds of EOTech Sights.

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Old 02-22-2013, 08:26 PM   #3
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I may not have the experience of Sniper but I have zeroed EoTech at 25 yrds before the same method i use with my iron sights:

I adjust so its spot on for left-to-right and its 1-2 inch low at 25 yds, then will be nearly spot on between the common engagement distances of 50-200 yards.
Over 250 yards I aim a little high.

However if Sniper has tons of experience with the Eotech 512 I will defer to his judgment and ask he give me some guidance on how good my above method is, to set me up for QCB w/ an Eotech.

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Old 02-22-2013, 08:32 PM   #4
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What's wrong with having it zeroed at 25yds?

You'll be at minute of badguy until the thaw comes.

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Old 02-22-2013, 08:56 PM   #5
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This is my setup, it has the standard front sight which, I'm sure you can tell, and the back one is a Troy Industries flip sight. I can't remeber what I had the irons zeroed at, but Ill probably have them at 25 yards or just at 50 to match the Eotech. I appreciate any advice you can give me.

ar151.jpg   ar153.jpg   ar152.jpg  
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Old 02-22-2013, 09:09 PM   #6
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Quote:
Originally Posted by Sniper03 View Post
Buskowski,

Send us a photo of your rifle so we can see what sights you have on it and we can go from there! If you already have your Iron Sights Zeroed. At what range are they Zeroed. Then we can better instruct you. You may have the hard part out of the way already. I will share that with you if you can provide the above information. I have zeroed hundreds of EOTech Sights.

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Might be hard to understand what Sniper is getting at with the iorn sights but he's right on in his thinking-
Edit cause---Just saw you're last--You need to know at what your battle sites are set at --
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Old 02-22-2013, 10:16 PM   #7
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Buskowski,

Thank you for the info! Here we go! First of all 25 yards in not a good range to zero at. If zeroing at 25 you will be very high at 100. But we will walk through a technique using the sights in your picture. First, one should zero the rifle at 50 or 100. I prefer 100 but 50 is so close it makes little difference. As your EOTech is mounted on your rifle with the Iron Sights Zeroed as mentioned above, you have got 90% of the work done.
You simply mount your rifle so it will be stable while making adjustments. Then you simply dial the reticle on the EOTech so it sets directly on top of the front sight post and centered side to side on the front sight post. This will put you right close to being zeroed and then you can do your final tweak adjustments on the EOTech since you will be very close to being zeroed. To make the final adjustments on the range the adjustments on the EOTech represent 1/2 inch of adjustment at 100 yards or at 50 yards each adjustment (click) would represent an adjustment of 1/4 " So once you do the reticle you should be very close and for sure on the target material to start with. But you need to zero your iron sights first. In the meantime until you get to the range and for interim home protection use just dial the EOTech's reticle down on the top of the front sight as I have advised and you will have no problem using the optics in the meantime for close range protection. Hope this makes sense! If not let us know!

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Old 02-22-2013, 10:29 PM   #8
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Sniper,

Thanks for all that great info, it's very informative. My only remaining question is if you had a "in the ball park" estimate of how many inches from the bullseye my shots should land on a target at 25 yards, to have it be roughly zeroed in at 50 yards. For example, I have a WSM .300 that I use to hunt and I have it zeroed to hit 2 inches high at 100 yards, which makes it hit right on at 200 yards. Would I be incorrect in assuming that if I had my shots hitting one inch above the bullseye on a 25 yard target with my AR; it would be hitting right on at 50? I may just have to do as you instructed and wait until I can have access to a range more a equipped to my needs.

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Old 02-23-2013, 01:50 AM   #9
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No you need to hit low at 25 yds becaue the bullet is still on its way up at that range.
1.5 inch low or thereabouts is the rule of thumb to be right on at 100-150 and close enough at 50-200

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Old 02-23-2013, 05:34 AM   #10
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Got it. Thank you for all your help.



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