Zero in Eotech please help

[1lostinspace]

I am looking to zero in at 200 yards does anyone know where I should be at 50 yards? I reloaded some 75bthp 25 gr varget.
Most of my mags will be loaded with my reloads and some with m855


I have an AR15 16" quad rail Yankee hill with an eotech.

I heard that if you want to battle sight you need to be dead on at 50 yards is that true?

 

[Mannlicher]

a 200 yard zero for a holo sight is not going to do you a lot of good. I have my EOTechs set for zero at 75 yards.
At 200, the dot pretty much covers the target. This is NOT a sniper sight.

 

[DMK]

A 200 yard zero will be fine with 223. That should put you approximately +/- 2" about to 250 yards or so.

Zero it so Point of Impact = Point of Aim at 50 yards. That's approximately 1.9" high at 100 yards.

http://groups.msn.com/TheMarylandAR15ShootersSite/improvedbattlesightzero.msnw

 

[rcmodel]

Try these for 300 yard battle-sight zero.

Boresight Target:
http://www.eotech-inc.com/documents/M16A4-M4MWS_EOTech_LBS_Target.pdf

25 meter, short range 300 yard zero
http://www.eotech-inc.com/documents/M16A4-M4MWS_EOTech_Live_Fire_Target.pdf

The EoTech can be quite precise as far as your eye can define the aiming point without magnification. And also how big the target is.

The trick is to turn the gain down so the dot is barely visible. It then is truly a 1 MOA dot, not the big pixilated blob it becomes at the standard high brightness setting.


rcmodel

 

[Wild Deuce]

+1 Mannlicher

When shooting at a brisk pace, I've noticed my EOTech gets me on a man sized target at 100 yards. I have to go to iron sights to get consistent center mass or really slow down with the EOTech. I think the center dot would occupy too much MOA for consistent, accurate 200 yard shots. I like rcmodel's idea of turning the gain down to get a barely visible dot but I still feel that at 200 yards, consistent eye/head placement in realtion to the EOTech will be more critical. At that range, I prefer the iron sights.

I'm not an expert shooter, though I play one on the internet.

 

[1lostinspace]

I am at zero right now with m855 I can group 5 shots 7-8" across so any where from 3-4 moa.

I have hit gallons of water at that range with no problem.

I just hate shooting and walking up 200 yards to see where it hit.
So going from m855 to 75bthp the point of impact will be different.

 

[DMK]

I think the center dot would occupy too much MOA for consistent, accurate 200 yard shots.

I don't understand this. I don't find the dot to be any larger than my front sight post.

Besides, you zero on the very top edge of the dot not the center of it (just like you would for iron sights). You shoot precision shots the same way.

 

[Wild Deuce]

DMK

Thanks, I see what you are saying. It makes sense too when you think about dialing down the brightness. I'll give it a shot next time at the range. Like I said, I am not an expert and fairly new to these holographic sights.

I'm still curious about the effect of consistent head/eye alignment for each shot and it's effect on accuracy at longer ranges (with a holographic sight). Hope someone more knowledgeable than me can weigh in.

 

[DMK]

I'm still curious about the effect of consistent head/eye alignment for each shot and it's effect on accuracy at longer ranges

Yes, you do need to place your cheek consistently on the stock for maximum precision. This is much easier to do with irons because you have three points of reference (rear sight, front sight, target).

With slow fire on a low recoil rifle like the AR, this isn't too difficult though. One way is to put your nose touching the charging handle and do not move your head from the rifle at all during a string of fire. Some folks even put a piece of tape on the stock to mark the spot where your cheek goes.

 

[1lostinspace]

I have hit 18" plates at 400 yards using eotech

 

[rcmodel]

I'm still curious about the effect of consistent head/eye alignment for each shot

The beauty of the holosight is that a properly made one, like the EO, does not have parallax like optical glass scopes do.

Where the dot is is where the bullet strike will be.
It doesn't matter if the dot is off to one side of the screen, up in one corner, whatever.

If the dot is on the target, that is what you will hit.

This target was shot at 80 yards with an EoTech (with the gain turned way down) on a Colt SP-1 Carbine.
And a tele-stocked AR is not conductive to a good cheek-weld!


You could project the same results out to 300 - 400 yards or more, if you can see that far, with enough visual acuity to hold on the target in the same exact place.

Of course the groups will get progressively larger the longer the range is, but the EO is certainly capable of long range shooting if your eyes are.


rcmodel