What is MOA shooting?

Discussion in 'Rifles, Bullets, Barrels & Ballistics' started by sewwhat89, Aug 6, 2005.

  1. sewwhat89

    sewwhat89 Well-Known Member

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    Last week at my range, a guy shooting 300 WSM 165 gr Nosler Accubonds said he had to shoot 12 MOA to print rounds at the 500 m range. Can anyone explain this to me?
     
  2. royinidaho

    royinidaho Writers Guild

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    1 MOA @ 100 yds = ~1 inch
    1 MOA @ 500 yds = ~5 inches
    12 MOA @ 500 yds = ~60 inches Unless I'm all messed up. I have no idea of what the fella was talking about. /ubbthreads/images/graemlins/confused.gif
     

  3. 308 nate

    308 nate Well-Known Member

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    MOA = minute of angle.
    1 MOA is approx. 1" at 100yds.
    2" at 200yds.
    3" at 300yds.
    4" at 400yds.
    and 5" at 500 yds.
    and 5.5" at 550 yds. which is approx 500 meters.
    so by saying He needed 12 MOA up from his 100yd zero he is saying from 100 yd to 500 meters His bullet drops 66".
    hope this is comprehendable.
    308nate
    OOPS Roy you beat me too it /ubbthreads/images/graemlins/grin.gif
     
  4. abinok

    abinok Writers Guild

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    What he probably meant was he had to adjust his scope up 12 moa to shoot at 500m. A moa is a minute of angle equivelant to 1.047" at 100 yds, but most simply drom the decimals and say 1MOA is 1" at 100yds... 2" at 200yds, 3" at 300yds and so on. In this instance, 12moa X 500yds equals 60" of adjustment, a bit much for this combo at that distance... but possible depending on the particulars. There are other possibilities, but this one is the most likley.
    Man, I must a been typing slow!!!
     
  5. Eaglet

    Eaglet Well-Known Member

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    sewwhat89,

    [​IMG]

    Many scopes have turrets calibrated in MOA'S. Usually, but not always, there are 4 clicks to one MOA at 100 yards.
    1 MOA = 1.047" @ 100 yards...... 1 MOA = 10.47" @1000 yards.
    What the man ment was that for him to be on target at 500 Meters, he needed to dial his riflescope turret in the up direcction 12 of those graduations seen in the above picture. 12 X 1.047 = 12.56" --- meaning he would have to be 12.56" high at 100 yards to be on target at 500 meters. If one has a range finder and a riflescope with turrets you just make the correct adjustment for whatever distance you ranged. You would need a drop table giving you MOA adjustments in order to do it right. I hope this helps.
     
  6. Eaglet

    Eaglet Well-Known Member

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    AND I WAS TYPING EVEN SLOWER! /ubbthreads/images/graemlins/frown.gif
     
  7. Gandolf1

    Gandolf1 Well-Known Member

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    So let me see if I got this right:

    If I shoot a group say 24mm OD at 200yds that would equal 0.35ish MOA?

    is that right?

    H
     
  8. RBrowning

    RBrowning Well-Known Member

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    Harrakhan
    24mm / 25.4 = .945inch

    .945 inch / 2.094 (1 MOA @ 200 yards) = .451 MOA

    MOA is an angular measuremet and can be used to refer to how far apart your bullets have spread at a certain distance (as Harrakhan is using it). Or it can measure how much you need to adjust your scope to get your group to hit where you are aiming due to shooting at a distance other than what you are zeroed for, or due to wind drift.
     
  9. royinidaho

    royinidaho Writers Guild

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    [ QUOTE ]
    So let me see if I got this right:

    If I shoot a group say 24mm OD at 200yds that would equal 0.35ish MOA?

    is that right?

    H

    [/ QUOTE ]

    To equate the group size back to a 100yd reference if the group were shot at 200yds divide by 2, if 400yds divide by 4 and so on.

    I round 'em down when I divide, makes 'em even smaller. Convert to inches from mm last, that way you can get some more rounding down /ubbthreads/images/graemlins/wink.gif /ubbthreads/images/graemlins/wink.gif
     
  10. sewwhat89

    sewwhat89 Well-Known Member

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    My 300 SAUM hs about 36" of drop at 535 yds. His 300 WSM claimed to have 60-66" of drop. Very interesting, but thanks for the clarification.
     
  11. Ridge Runner

    Ridge Runner Well-Known Member

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    the definition I always use is
    MOA: a unit of angular measurment equal to 1/60th of a degree or 1.047" per 100 yds
    JS