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Posted: 3/28/2012 11:49:09 AM EDT
A diagram would be perfect.
Link Posted: 3/28/2012 12:09:42 PM EDT
Link Posted: 3/28/2012 12:24:00 PM EDT
Thanks. But, the diagram does not mention the subtension of the large circle.

P.S. The Great Santini was a awesome movie.
Link Posted: 3/28/2012 3:25:08 PM EDT
I'm pretty sure it is 8 MOA
Link Posted: 3/28/2012 5:24:44 PM EDT
[Last Edit: 3/28/2012 5:25:21 PM EDT by RandyStacyE]
http://www.ar15.com/forums/t_3_18/490600_.html

I just google imaged the term "ACOG TA11 Horseshoe Reticle".
Link Posted: 3/28/2012 6:53:01 PM EDT
This is pretty cool. Nice. Now I just need to find the MOA values for the 300, 400, 500 ect.
Link Posted: 3/28/2012 8:42:15 PM EDT
Ranging is covered in the ACOG owner's manual. pg 11

Zero top of reticle at 100m. A 25m/300m zero is usable if the bottom of the reticle or 300m mark is used as POA=POI. This is not as accurate as the 100m zero.

Top of the reticle is supposed to be a 100m zero. If top of reticle is center of mass and the bottom of the torso/silhouette is midway between 500-600 hashes, target is ~ 100m. If top of reticle is center of mass and the 400m hash is at the same height of the bottom of the torso/silhouette, target is ~200m. Bottom of reticle center of mass or top of reticle at shoulder height and 400m hash is just above bottom of silhouette, target is 300m. The 400 hash mark is the width of an average person's torso at that range, so on an so forth.
Link Posted: 3/29/2012 4:32:21 AM EDT
Ranging is not the same as the subtensions or MOA values. If you know the subtensions, then you have more flexibility with different loads.
Link Posted: 3/29/2012 7:07:34 AM EDT
IF you are wondering the width of the subtensions then my last sentence should answer your question then. The substension is 18" (average width of a persons shoulders IIRC) at 400m, and so on and so forth from the 400m mark. Should be able to figure out MOA from that.

Sorry for the rest of the mumble, it was late.
Link Posted: 3/29/2012 8:55:26 AM EDT
I don't think you understand. I am looking for the MOA values for the 300, 400, 500 ect..

Link Posted: 3/29/2012 9:34:00 AM EDT

Originally Posted By M4coyotehunter:
I don't think you understand. I am looking for the MOA values for the 300, 400, 500 ect..
If that's all you need then all you need to do is a little math.

The the dot is 2 MOA and the circle is 8 MOA at 100 yrds, then their size will double at 200 yds, triple at 300 yds, quadruple at 400 and so on and so forth.

That said, this information is of somewhat limited value given that the ladder portion of the reticule is sized so that the horizontal bars will tell you what the size of the target (human) is when those lines are put over the target's shoulders. At least than 300 yds, you're using the main reticule so while knowing the size of the reticule is somewhat useful, it doesn't matter than much because your average AR round will be pretty much flat out to 225 yds.
Link Posted: 3/29/2012 9:59:21 AM EDT
[Last Edit: 3/29/2012 10:00:47 AM EDT by M4coyotehunter]
This is wrong too.

Currently, with the information given, no "math" will give you the MOA drop values for 300, 400, 500. I am not interested in stadia width. This isn't rocket science.
Link Posted: 3/29/2012 10:08:11 AM EDT
Link Posted: 3/29/2012 10:43:50 AM EDT

Originally Posted By M4coyotehunter:
This is wrong too.

Currently, with the information given, no "math" will give you the MOA drop values for 300, 400, 500. I am not interested in stadia width. This isn't rocket science.
I agree, it's not rocket science - it's English. ;) If you're not getting the answer you seek, rephrase your question.
Link Posted: 3/29/2012 1:55:26 PM EDT
[Last Edit: 3/29/2012 1:55:55 PM EDT by M4coyotehunter]
The question was very clear. Fortunately, Trijicon knows how to read english. They "got it" right away.

Thank you for your patronage of Trijicon products. The TA11G ACOG’s ballistics are based on M855 ammo (62 gr) at 2858 fps. Please contact us if you require further assistance.

100 meter ZERO center dot at 2 moa, horseshoe is 8.3 moa OD
9.0 moa for 400 M
14.5 for 500 M
21.6 for 600 M
30.4 700 M
40.9 800 M
52.7 900 M
66.0 1000 M

Link Posted: 3/29/2012 3:37:14 PM EDT
I was getting tripped up on the title of your thread. First talking reticle size and then wanting the 'drop in MOA'
Link Posted: 3/29/2012 4:50:24 PM EDT
Golly. A lot of information to process.
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