MOA Question

[Rugerman]

I know a little about MOA, but I have a couple of questions.

I understand that MOA=1"@100yrds, so if you shot a 5 shot group into a 1" circle at 100yrds, then your rifle shoots 1MOA correct? Likewise, if every shot goes into a two-inch circle at 200yrds, then you're shooting 1 MOA also right?

Now, heres where it gets confusing for me. Say you get a 10" group at 500yrds, then how do you get 2MOA?

Is it because since 1MOA=1"@100yrds, and since your shooting 10" groups, 100x10=1000yrds, but since the group is at 500yrds, 1000/500=2 which leads to 2MOA?





Thanks for the help!

[PistolPete75]

I know a little about MOA, but I have a couple of questions.

I understand that MOA=1"@100yrds, so if you shot a 5 shot group into a 1" circle at 100yrds, then your rifle shoots 1MOA correct? Likewise, if every shot goes into a two-inch circle at 200yrds, then you're shooting 1 MOA also right?

Now, heres where it gets confusing for me. Say you get a 10" group at 500yrds, then how do you get 2MOA?

Is it because since 1MOA=1"@100yrds, and since your shooting 10" groups, 100x10=1000yrds, but since the group is at 500yrds, 1000/500=2 which leads to 2MOA?





Thanks for the help!

if your are talking about shooter's moa, yes you are right. 1moa at 100yards is technically 1.047197580733 inches

[bwiese]

The distance MOA refers to is the chord subtending the arc formed by 1 minute of circular angle (1/60th of a degree) for a given radius to the target.

As the math works out, 1MOA is about 1" @100yds, yes.

But 1MOA is also approx 2" at 200yds, 5" @ 500yds, 10.5" @ 1000 yds. etc.

Working the math out, 1MOA @ 100yds is actually around ~1.047".
We just call it 1" 'cuz it's close enough for practical purposes.

[Rugerman]

Say your shooting 2" groups at 100yds, then would your MOA be 2MOA?

[PistolPete75]

Say your shooting 2" groups at 100yds, then would your MOA be 2MOA?

yes. you got the idea.

[Nodda Duma]

By the way 1 MOA is considered the limiting resolution for a typical person's eye. That's about as detailed as you can see using long-distance vision (YMMV depending on how good your eyes are). That is why it's the standard reference angle.

The ratio 1"/100 yards and 5" / 500 yards gives approximately the same angle, roughly 1/60 of a degree, or one arcminute (thus MOA).

The metric system has a similar measurement called milliradian. 1 mrad = 1 meter circle at 1000 meters. It is roughly 3 1/2 MOA.

-Jason

[Rugerman]

yes. you got the idea.

So you basically multiply by 100 then divide by the range you were shooting at right?

Check this one for me.

1/2" groups at 50yds.

So 0.5" x 100 = 5

5/50 = 0.1

So your MOA is 0.1? I've heard of 1/4MOA, but 1/10MOA? Is that even possible? LOL

[40caldeserteagle]

So you basically multiply by 100 then divide by the range you were shooting at right?

Check this one for me.

1/2" groups at 50yds.

So 0.5" x 100 = 5

5/50 = 0.1

So your MOA is 0.1? I've heard of 1/4MOA, but 1/10MOA? Is that even possible? LOL

Check your math.

[aplinker]

Hope this helps, note inch values are approx. If you were shooting 2MOA you would have to double the width of the cone all the way out, and vice-versa for 1/2MOA.

[mecam]

Bob Lee Swagger can do 1MOA at 1000yds. So that's actually 0.10MOA.

[fusionstar]

I've shot 5 shot group 0.10 MOA with a 700p, but averages just under half moa... its another beast at 200+ however.

[Mute]

You guys need to work on your math. .5" at 50 yards = 1 MOA and is equal to 1" at 100 yards (still 1 MOA). You double the value because you double the distance. And 1 MOA is 1 MOA regardless of whether it's at 100 yards or 1000yards. Only difference is 1 MOA at 100 yards = 1.047" or 1" if you're using shooters MOA (also known as IPHY - inch per hundred yard). At 1000 yards 1 MOA = 10.47" or 10" if shooters MOA.

[NRAhighpowershooter]

Bob Lee Swagger can do 1MOA at 1000yds. So that's actually 0.10MOA.

and just for poops and grins..
the record for a 50cal at 1K yds is under 3" !!! (actually 2.94" group I believe)

[sloguy]

minute of angle is a 60th of a degree. in other words, there are 360 degrees so one deg is called an angle. minute means a 60th, as in there are 60 minutes in a hour. so minute of angle means a 60th of a degree.

for perspective the moon is 30moa. a circle at 100 yards that is 30 inches across will appear the same size as the moon.

[aplinker]

minute of angle is a 60th of a degree. in other words, there are 360 degrees so one deg is called an angle. minute means a 60th, as in there are 60 minutes in a hour. so minute of angle means a 60th of a degree.

for perspective the moon is 30moa. a circle at 100 yards that is 30 inches across will appear the same size as the moon.

Objects in the Mirror Appear Closer than They Are