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MOA?

chumchum
I have what some might see as a dumb question but if you dont ask you dont learn.What is MOA?I beleive it has to do with rifle accuracy and it stands for minute of angle(IM not sure though)But what does this refer too what is the minute of angle?Dont look down on me for not knowing Im still in the learning curve.But arent we all.Thanks Fellas.This site is priceless and always willing to help.With your help I just might know something someday.

Eric S. Williams
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Comments

8 comments

Date Votes
  • chumchum
    Hi, I'm not sure what the measurement of MOA is? This new scope said it adjustments are 1/10 MOA. What does that mean?

    Thanks
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  • Don McManus
    1/10 MOA is 1/10th of a Minute of Angle.

    A Minute of Angle is 1/60th of one degree.

    At 100 yards, 1/60th of 1 degree is approximately 1".

    1/10th of 1 MOA is therefore approximately 1/10th of 1" at 100 yards.

    At small angles, this is roughly linear, so the at 200 yards, it is 0.2", and at 1,000 yards it is approximately 1".

    Obviously the scope does not compensate for drop, so POI will diverge from POA as distance increases.
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  • XXCross
    For my two cents worth, I'd say that is WAY too fine of increment to be of any real use. Quarter minute adjustments are all the average shooter needs.
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  • 45forme
    quote:Originally posted by XXCross

    For my two cents worth, I'd say that is WAY too fine of increment to be of any real use. Quarter minute adjustments are all the average shooter needs.


    I agree since a '1 MOA' rifle (meaning shot groups are smaller than 1 MOA or a 1" circle at 100yds) is considered a very accurate rifle. An extremely accurate rifle is 1/2 MOA, so why adjust at 1/10's?
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  • FEENIX
    Chumchum,

    Others have covered the MOA already. As far as the 1/10 MOA adjustments goes, it's not necessarily a finer adjustment than average (1/4 or 1/8 click MOAs) instead, because of the reticle design. Hope this helps.

    I have a friend that has a Bushnell Elite 3200 Tactical Rifle Scope 10x40mm 1/10 Mil Adjustments Mil-Dot Reticle. This scope features 1/10 milliradian (MIL) windage and elevation turrets and a Mil-dot reticle; this is also known as MIL/MIL. The combination of these two features enables the shooter to make quick and precise corrections.

    By using the Mil-dot reticle to measure how far off the shot is in MILs, each dot is 1 MIL apart, the shooter does not need to convert milliradians to minutes of angle in order to correct the point of aim. With traditional 1/4 MOA turrets, if the point of impact is measured to be 1.5 MILs low the shooter needs to convert the MILs to MOA and then adjust the turrets which can be confusing. With a MIL/MIL rifle scope if the shot is 1.5 mils low then the shooter simply turns the turret 1.5 mils or 15 clicks.

    Enjoy your new scope.Good luck and happy safe shooting/hunting!
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  • JustC
    1.047" at 100yds= 1 MOA

    1/10 moa is a very precise adjustment (most likely for benchrest type shooting). You will need 10 clicks to move the point of impact 1" at 100yds, 5 clicks at 200yds, etc.
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  • tsr1965
    I have never personally seen a scope that has had any finer adjustment than 1/8 MOA. The ones that I have seen that are 1/10, are 1/10 Mil.

    For the record, 1 Mil is equal to one yard at 1000 yards, or 36 inches at 100 yards. That would equal 3.6 inches at 100 yards, or 3.6 MOA. 1/10 mil would equal 0.36" at 100 yards. The 1/4 MOA adjustment has finer resolution, and the 1/8 MOA, is even finer yet.

    The measurement of MOA is a direct multiplier at longer distance. Where a MOA=1.047"at 100 yards, at 400 yards a MOA is 4x that, or 4.188"...we usually round it down for calculations to the nearest inch...or 4" at 400 yards, and 7" at 700 yards, etc.

    Hope this sheds some light on the subject. If not, drop me an e-mail, and I would be glad to help further.

    Best
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  • sandwarrior
    As noted above MOA=1.047" @ 100 yds. And also noted was the 1/10th possibly being mil/mil. Which is 36" @ 1000 or 1m @ 1 kilometer. I'm thinking quite possibly you have a typo on your box.

    The only way to know for sure is to take it to the range and get the rifle in the bags nice and firm. Take a friend. While you view the target note how much the reticle moves when you turn the turrets. You will need a nice clear target with colors you can see easily distinguish at 100 yds. If it is 1/10 MOA adjustments it will take ten clicks to come up/down or L/R to move one inch. If it's 1/10 mil it will move just over an inch in three clicks.

    -good luck
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