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Thread: First time poster with some questions

  1. #1
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    First time poster with some questions

    I'd like to start with saying that this is a great forum to learn about the AR platform. I read through here for several months before deciding to pick up a Daniel Defense M4V4. I'm glad I took the time to read through the comments and learn from others who have far more experience than I do with the platform. I outfitted the flat top configuration with Troy BUIS. I did a little research and tried to understand the various zero options for the rifle. Today was actually my first time shooting the rifle and only had time to push the rifle to 25 yards. I took a picture of the last few shots and wanted to ask if this would make the current set up that I have a 50 yard zero? The group I shot seems to be roughly 2inches lower than the center of the target. I know it's not the best group ever but this is really the first trigger time I've had with an AR platform. I know that there are a couple of shots really close to center and a couple a little lower than 2 inches, but I focused on being 2 inches low at 25 yards as this was my understanding of a 50 yard zero while only being able to shoot 25 yards. Am I correct? Thanks in advance

  2. #2
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    You will be close enouigh to actually zero at 50.
    Remember, you are only zeroed at the distance you actually shoot, everything else is a guess, an educated guess, but unverified none the less.
    Jack Leuba
    Director, Military and Government Sales
    Knight's Armament Company
    jleuba@knightarmco.com

  3. #3
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    Quote Originally Posted by Failure2Stop View Post
    You will be close enouigh to actually zero at 50.
    Remember, you are only zeroed at the distance you actually shoot, everything else is a guess, an educated guess, but unverified none the less.
    So with this current set the way it is, is it safe to say that the next time I have a trip to the range I could just set the target up at 50 yards and be on paper? I'm trying to dial it in with M855. I believe I read that you could zero with M855 and be able to shoot M193 and not be that far off... however not vice versa. Sorry to ask so many questions, but I just don't want to waste money, time and effort and not having the right ideas behind the basic concepts.

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    Quote Originally Posted by TylerD View Post
    So with this current set the way it is, is it safe to say that the next time I have a trip to the range I could just set the target up at 50 yards and be on paper?
    Yup.

    I'm trying to dial it in with M855. I believe I read that you could zero with M855 and be able to shoot M193 and not be that far off... however not vice versa.
    You can pretty much shoot a random handfull of different cartridges at 50 yards and be fine. I usually see less than 2" of shif at 100 meters between any two different cartridges.

    The issues don't really show up unless you are shooting at distances past 100 meters and are precision oriented. Still, it's always a good idea to have a dead-nuts zero with your preferred/most used/or most important ammo and use the rest for distances inside 100.

    Sorry to ask so many questions, but I just don't want to waste money, time and effort and not having the right ideas behind the basic concepts.
    No problem, it's what we do here.
    Jack Leuba
    Director, Military and Government Sales
    Knight's Armament Company
    jleuba@knightarmco.com

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    I appreciate your help. I think most of the variation in my shooting today came from my sight picture more so than the ammo or distance. I'm new to shooting rifles, so it is hard for me to find a sight picture that is exactly the same each time I look through the sights. I think this is going to be the main issue for me.

  6. #6
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    Highly recommend zeroing from the prone.
    Jack Leuba
    Director, Military and Government Sales
    Knight's Armament Company
    jleuba@knightarmco.com

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    I shot from a bench. I supported the rifle with a bag under the rail and tried to keep as level as possible. I used the large aperature on the rear sight as well. Should I have used the smaller one?
    Last edited by TylerD; 10-10-11 at 14:08.

  8. #8
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    Quote Originally Posted by TylerD View Post
    I shot from a bench. I supported the rifle with a bag under the rail and tried to keep as level as possible. I used the large aperature on the rear aight as well. Should I have used the smaller one?
    Shoot prone (with magazine on the deck).

    You can zero with large ap, but most people are going to use the small ap for accuracy.


    C4

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    If you are using a carry handle, chances are that the small aperture is going to be a slightly different point of impact (POI) compared to the large aperture due to the two being on different planes. At the bottom of the aperture, you will see 0-200M on the large, and 300M on the small. The large aperture is used for closer distances, and the small is used for futher. Beyond 300m, you will use the elevation drum to change the point of aim and point of impact (POA/POI) on your rifle to make hits. But, if you are using a back-up sight like a Troy, Larue, Daniel Defense, these typically do not have an elevation drum, and the two apertures are on the same plane so there is no difference between the two except for the lens effect of the smaller aperture.
    Quote Originally Posted by Coal Dragger View Post
    Marines love CLP. Chow, libo, pussy.

    Beyond that everything else is a crap shoot.

  10. #10
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    Smaller aperture is easier to be more accurate with. Use it for your zero.
    C co 1/30th Infantry Regiment
    3rd Brigade 3rd Infantry Division
    2002-2006
    OIF 1 and 3

    IraqGunz:
    No dude is going to get shot in the chest at 300 yards and look down and say "What is that, a 3 MOA group?"

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