MOA - minute of angle ?

Discussion in 'Rifles' started by Big country, May 14, 2009.

  1. Big country

    Big country TGT Addict

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    Mar 6, 2009
    Cedar Park,TX
    MOA- what is the actual definition of moa? I was told that it is a 1" group @100 yds, 2"@ 200 yds so on and so forth. Is this so? I know it means minute of angle but what is minute of angle and how do you determine what it is?
     


  2. Charley

    Charley Active Member

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    At 100 yards, MOA is approx. 1.047 inches. One minute of angle is 1/60 of a degree, one degree is 1/360 of a circle.
     
  3. Shadow 2

    Shadow 2 New Member

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    Lago Vista
    Charley nailed the technical definition. But in the field it's 1 inch at 100 and so on and so forth
     
  4. Charley

    Charley Active Member

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    Measurements don't change "in the field". 1 inch is "close enough" for most practical considerations, but it isn't correct.
     
  5. 40Arpent

    40Arpent TGT Addict TGT Supporter

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    Houston
    Measurements actually do change in the field. When I am shooting at the 100 yard range, it is 100 yards. When I am shooting "in the field" at a deer that is at 100 yards, it will become a 200 yard shot when I get back and tell all my buddies about it. There's your "change in the field."

    ;)
     
  6. Starker

    Starker Active Member

    :lolz:
     
  7. Big country

    Big country TGT Addict

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    You do have a point there! ;) But back on topic for a second. So my original understanding was correct for the most part and it is 1.047" per 100 yds. thank you all for the replies
     
  8. Charley

    Charley Active Member

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    Yeah, I hadn't considered that change. The kind of friends I have, they would go measure your shot and ride you unmercifully if they can prove you're BSing!

    'course there was that time I shot that doe in the next time zone...
     
  9. navyguy

    navyguy TGT Addict

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    DFW Keller
    What they said.... MOA figure 1 inch at 100 yards. A good bolt action rifle should be capapble of 1/2 MOA. Of course wind and operator error add to that. But if you can shoot a group, from a rest at 100 yards and it's less than an inch, and about and inch high from POA, you're usually good to 250 yards on deer sized game without any hold over.
     
  10. M. Sage

    M. Sage TGT Addict

    Jan 21, 2009
    San Antonio
    1 MOA = 1" is close enough for government work. It'll get you hits out to 300 yards without much problem. It's when you push out to long range that it becomes more important to get it exactly right. The bigger the MOA correction you'll be making, the more important getting the number exactly right will be.
     

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