25 Yard zero for 300 meters?

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  • Ares33G

    Member
    Feb 15, 2012
    7
    Rockville, MD
    I tried looking through Google and found no results.
    I want to zero my AR to 300 meters.
    However, the range closest to me only offers 25 yards.
    I'm far too lazy to drive further just to zero.
    So I'm a couple meters shy to zero at 25M.

    I was wondering if anyone could help me figure out how big a target should be at 25 yards to zero at 300 meters. Anything close to a 300M zero would be great.

    Thanks!
     

    steves1911

    Ultimate Member
    Dec 2, 2011
    3,025
    On a hill in Wv
    When i was stationed at Andrews AFB the only range there was 25m. We zeroed our rifles on a silhoutte that represented a human torso at 300m. When we went down to AP hill we shot pop up targets out to 300m with no further sight in needed. Im sure we wernt hitting poa on the pop ups but it was close enough everbody still qualified and most shot expert.
     

    Biggfoot44

    Ultimate Member
    Aug 2, 2009
    32,777
    In the rough rule of thumb, sight in at your 25yd. To split hairs , possably just barely low..

    Disclaimer A: not a big believer in close range sighting for long range, sight in ( to a particular impact point) at 100 or more , then work backward to verify at close.

    Disclaimer B : if you are going to do the close range sighting in , 50yds is more useful trajectory.
     

    peace

    Ultimate Member
    Dec 15, 2011
    1,043
    AACo
    A lot of this also depends on the caliber and load. Shooting is really just a few complex math formulae put together. I highly recommend reading into the details of ballistics(specifically trajectory) while "zeroing" your scope. You will find that every shot at every distance and in every environment is different.
     

    smokey

    2A TEACHER
    Jan 31, 2008
    31,369
    When using the ballistics calculator, keep in mind that ar's height over bore isnt 1.5 inches. It's usually closer to 2.5-2.75 depending on ure setup. This makes the 50 yd zero much more useful. You dont have the bullet over top of your sight line as high for as long.

    With 193:
    50 yds-0
    100 yds- +1.7
    150yds- +2.3
    200 yds- +1.7
    250 yds- -.2
    300 yds- -3.7

    Sure beats it being +11" at 200
     

    tmcxba

    Member
    Feb 8, 2013
    1
    When i was stationed at Andrews AFB the only range there was 25m. We zeroed our rifles on a silhoutte that represented a human torso at 300m. When we went down to AP hill we shot pop up targets out to 300m with no further sight in needed. Im sure we wernt hitting poa on the pop ups but it was close enough everbody still qualified and most shot expert.

    The military 25/300 meter zero actually has one more bit to it. While zeroing at 25m we turned the rear elevation knob from 8/3 (or 6/3 for an m4), to 8/3 +1 , then zeroed at 25 meters, and set the knob back to 8/3 for the 300 meter range.

    I don't remember how much MOA that one click of the rear elevation knob is though, and that was for M16A2 (20 inch barrel with fixed handle 8/3 elevation knob).

    and apparently reading around on the internet some, there's different MOA adjustments for that elevation knob on AR-15's (outside of the obvious difference an m16 length rifle compared to the shorter m4 length rifle presents).

    Been wishing for a while i'd got a 20in AR15 instead of this carbon 15 i have (about 16 inch with the shorter sight radius, and whatever genius at bushmaster it was that decided to put a raised rail on the upper receiver. Because of that there's no room for an elevation knob... should have got a different rifle lol... because there is no elevation knob i've really no idea how to zero the rifle for 200 or 300, and the shorter barrel changes the trajectory compared to what i already know.)
     

    Flipz

    Ultimate Member
    Mar 11, 2010
    3,193
    I tried looking through Google and found no results.
    I want to zero my AR to 300 meters.
    However, the range closest to me only offers 25 yards.
    I'm far too lazy to drive further just to zero.
    So I'm a couple meters shy to zero at 25M.

    I was wondering if anyone could help me figure out how big a target should be at 25 yards to zero at 300 meters. Anything close to a 300M zero would be great.

    Thanks!

    My guess is that you go to Gilberts. Sorry to hear that. I live in the MoCo area myself and go to MSAR instead. It's only a 35 minute drive and well worth it. They have ten 50 yard indoor rifle lanes, aswell as fourteen 25 yard handgun lanes, and you can bring your own ammo. Also, its only $15 for the entire day. No hourly rate or time limit. It doesn't hurt that its the nicest indoor range in the state. Everything is brand new. Their new facility is huge.
     

    OLM-Medic

    Banned
    BANNED!!!
    May 5, 2010
    6,588
    IMO the 25/300 zero isn't the greatest. I think the 50/200 is far superior since it pretty much is a flat trajectory up to 200 yards.
     

    md123

    Ultimate Member
    Jul 29, 2011
    2,005
    IMO the 25/300 zero isn't the greatest. I think the 50/200 is far superior since it pretty much is a flat trajectory up to 200 yards.

    FWIW, page 19 of this pdf file was helpful for me to choose a zero. It lines up 25 yrd to 300 yrd zero targets and show where the round will hit at various distances. It validates OLM-medic's post...200 yrd zero makes a sweet group at most distances.

    http://gunwebsites.net/wp-content/uploads/2011/09/Guns-AR15-Zero-Introduction.pdf

    Video version....

     

    cantstop

    Pentultimate Member
    MDS Supporter
    Aug 10, 2012
    8,129
    MD
    The military 25/300 meter zero actually has one more bit to it. While zeroing at 25m we turned the rear elevation knob from 8/3 (or 6/3 for an m4), to 8/3 +1 , then zeroed at 25 meters, and set the knob back to 8/3 for the 300 meter range.

    Those are basically the directions from my M4 Colt Match Rifle manual. There are also a couple tables that give the delta per click for 16" vs 20". I think you can download the manual off of Colt's web site.

    :)
     

    OLM-Medic

    Banned
    BANNED!!!
    May 5, 2010
    6,588
    FWIW, page 19 of this pdf file was helpful for me to choose a zero. It lines up 25 yrd to 300 yrd zero targets and show where the round will hit at various distances. It validates OLM-medic's post...200 yrd zero makes a sweet group at most distances.

    http://gunwebsites.net/wp-content/uploads/2011/09/Guns-AR15-Zero-Introduction.pdf

    Video version....



    Too lazy to click the video...but...

    For those who can only go as far as 25 yards or meters, there are targets out there designed so that you shoot at a dot at 25, but the impact is SUPPOSED to be in a circle below that dot. This gives an approximate zero for 50 yards or meters if you can only shoot at 25.
     

    Spatha

    Member
    Sep 17, 2011
    63
    AA County
    Standard A2 carry handle sight 8/3 +1 then back to 8/3 for longer ranges. You should put 5 of 6 shots into a 4cm circle at 25m or yards. If you are using any of the BUIS available contact the maker. They are all a little different. A general rule of thumb for BUIS is to just use the 300 setting.

    If you are using an aimpoint, eotech, or ACOG hold (POA) center mass. Your POI should be about 1.5cm low. For minute of man shooting out to 300 red is dead. That being said if you look at any of the ballistic charts you will see there is some deviation at all ranges.
    Google up small arms readiness group. They have some really good info (if it is still accessible.
     

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