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Thread: Whats your Red Dot Zero? 25-50-100 yrds?

  1. #61
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    Quote Originally Posted by The_Katar View Post
    I suggest taking your rifle out and zeroing it at your chosen range and learning and understanding that zero. Shoot at 10, 25, 50, 75 yards and learn firsthand what your holdoffs are. Charts are nice but nothing replaces actually *knowing* your zero.

    EXACTLY.

    All of these charts, graphs, etc. are a nice reference to give you a "Ballpark" understanding of where your bullets will impact at various distances, but you need to go out and shoot at those distances to know exactly what you, your gun, and your ammo choices will do.
    Last edited by nickdrak; 07-22-09 at 22:27.

  2. #62
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    ***********
    Last edited by ZDL; 05-01-10 at 14:23.

  3. #63
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    Did someone allude to the zero distance and its effect when shooting at a cant or urban prone. A 100 yard zero would reduce the left-right holds when shooting at a cant, correct? Or I would think almost all those shots would be under 100 yards usually?

    After reading Paul's article, and having poor reading skills, I'm wondering how the size of your aiming point (post for him, 4moa dot for here) affects your choice of zero?
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  4. #64
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    I walked the dot onto a steel target at 200m and shot at smaller targets til I was hitting the smallest (6"?) consistently, good zero if you ask me.

  5. #65
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    To answer some unanswered questions

    1. all the charts posted appeared to be for 55gr FMJ BT bullets fired at 3000FPS. Any deviation from those numbers will effect the flight of the bullet. Also keep in mind none of these examples deal with windage. I would suggest the anyone that has an iphone download the app called ballistic. What is nice about this program is it allows you to change all of the parameters. I can also get real time data based on the current conditions and altitude. Probably the most important thing to get is a good velocity of your rifle with the ammo you intend to use.

    2. Someone asked about the importance of the dot size, so in a nut shell. A 4moa dot is going to cover up a 4 inch circle at 100 yards, 8 at 200, 12 at 300. Now this is important because you are limited in your adjustability. If you have a 4moa dot you are pretty much limiting your rifle to a 4 inch capability. You can get it smaller if you learn to use smaller portion of you dot. Another way to think of it is the larger the moa size the more of the target you cover up. An example of this would be taking a headshot at 200 yards, with a 4moa dot your dot is covering 8 inches of the head. Now if you had a 1 moa set of cross hairs or a 1 moa dot you will only cover up 2 inches.

    I personally use a 50 yard zero. It is the flatest in the range that I shoot my rifle. If you think about the fact you are within 2.5" of LOS from 0 to 250 makes it very usable for what is considered the effective range of the round. I don't even have to think about holds until after 300. This can not be said for any other normally used zero range.

    Matt

  6. #66
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    Quote Originally Posted by glockshooter View Post
    To answer some unanswered questions


    2. Someone asked about the importance of the dot size, so in a nut shell. A 4moa dot is going to cover up a 4 inch circle at 100 yards, 8 at 200, 12 at 300. Now this is important because you are limited in your adjustability. If you have a 4moa dot you are pretty much limiting your rifle to a 4 inch capability. You can get it smaller if you learn to use smaller portion of you dot.

    The highlighted statement is false. I fired the 10-shot group pictured below with a 4 MOA Aimpoint, using the whole dot centered on the target, at a distance of 50 yards. The extreme spread is 0.548" which is slightly over 1 MOA.


    Last edited by Molon; 07-23-09 at 10:21.
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  7. #67
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    As Molon points out the fact the dot is 4MOA means nothing other than you cant really see whats under your dot.

    If you keep the top or bottom of the dot in a constant point on the target, your not limited by anything other than you...
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  8. #68
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    Molon

    I did not say you can not get it smaller you highlighted what you believe is false but you left out the sentence right behind it.

    You can get it smaller if you learn to use smaller portion of you dot.
    IE the top of the dot.

    The average person is not going to get their rifle shoot much better than their dot size or crosshair size. It can be done but only by two things 1. being skilled and KNOWING your zero or 2. Being lucky.

    An experienced guy that understands how all these things work can do as you and I have done with shooting small groups with a dot.

  9. #69
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    Quote Originally Posted by glockshooter View Post
    Molon

    I did not say you can not get it smaller you highlighted what you believe is false but you left out the sentence right behind it.

    IE the top of the dot.
    That's because I did not use the top of the dot to shoot that group. Read what I already posted, "USING THE WHOLE DOT CENTERED ON THE TARGET."
    Last edited by Molon; 07-23-09 at 15:27.
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  10. #70
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    Good thread.

    My .02$, after reading PH's article, and shooting/ walking it....I think the 100y Zero is the way to go.

    Even if you zero at 25 yards, at 20 or 15 yards, you're still going to have to "hold over" for a precise hit. So, IMO, inside of 25y, you just have to know it's gonna hit between 1" and 2" low. (I've got the CSAT rear sight if I want to make precise shots at 7y, anyway)
    So, I think you should select your zero based on what it does after 25 yards.

    Looking at the 100y zero, you're either dead on, or as much as 1.5-2" low all the way out to 200y. You're never switching between being low and high, and you're shooting though a 2" window all the way out to 200y. With the 50y zero, you're shooting withing a 4" window (+/-2").

    I think the 100y zero affords the shooter a more precise understanding of where their shots will land, for the more realistic distances they can expect to use their carbines within, without having to range and adjust on each different target they engage.

    A 300y shot still will find the torso, and to quote Paul "A shot to the stomach will take them out of the fight at 300 yards. If you need to make a precision shot at 300 yards, you brought the wrong gun."

    I'll take added precision out to 200 yards, for needing a little more hold-over at 300 yards...should the situation ever require that hold over.

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