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04-12-2010, 07:11 PM
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Join Date: Oct 2009
Location: WMU 108
Posts: 2,465
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sub MOA?
What is sub moa?
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04-12-2010, 07:16 PM
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MOA is 1.047" so its less than that,, or close enough to under 1"
This is for a 6" circle
The distance covered by 1 degree of angle (37.6992 / 360 or, circumference divided by 360 degrees) is 0.1047 inch at 6 inches from center of circle.
And, 1 minute of angle represents (0.1047 / 60 or, 1 degree divided by 60 minutes) 0.001745 inch at 6 inches from center of circle.
Knowing what MOA represents allows us to calculate its value to any distance.
Six inches (the radius of the above example) is 1/600th of 100 yards: (100 yards x 36 inches) / 6 inches = 600
Therefore, the value of MOA at 100 yards is 1.047 inches (0.001745 x 600 = 1.047)
At 50 yards 1/2 the 100 yard value; 70% @ 70 yards; twice @ 200 yards; 6 times @ 600 yards; and so on.
So, the difference between thinking in inches as opposed to MOA is 0.47 inch @ 1000 yards.
Last edited by noneck180; 04-12-2010 at 07:27 PM.
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04-12-2010, 07:18 PM
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Join Date: Dec 2008
Location: Cypress County, AB
Posts: 336
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MOA = 1" @ 100 yards; so, if you shot your rifle 5 times into a 100-yard target and every shot went into a one-inch circle you had drawn on the paper, then your rifle could be said to shoot 1 MOA
This carries on and at 2 hundred yards minute of angle would be 2'' and 3 hundred yards minute of angle would be 3'' so sub moa is anything under minute of angle at a known distance.
It gets more technical but there are people more qualified on here to explain that.
Noneck180 explained better.
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04-12-2010, 07:27 PM
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Join Date: Sep 2007
Location: st.albert
Posts: 409
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moa
just to expand on that alittle for ya, most out of the box rifles shoot groups of 1-1 1\2 inch at 100 yrds which is good enough for the common joe and average hunting.
some of us and target shooters for sure look for or build rifles that are sub-moa , meaning we want it to shoot less than .99 inch at 100 yrds .
hope that helps ya,
good luck with the new rifle your gunna buy.
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04-12-2010, 07:34 PM
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Join Date: Oct 2009
Location: WMU 108
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I just got my Remington 700 in 300WSM XCR. That would be great if it did that, but Im not that picky.
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04-16-2010, 05:40 AM
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Join Date: Jan 2010
Location: edmonton
Posts: 338
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So, the difference between thinking in inches as opposed to MOA is 0.47 inch @ 1000 yards.[/QUOTE]
Simplified, 1 minute of angle is 1.047 inches at 100 yards, also written as 1 and 3/64 inches (this is rounded to the nearest 1000th)
200 will be 1.047 x 2 = 2.094 or 2 and 3/32
The last statement must be a typo. at 1000 yards a minute of angle is equal to 10.47 inches or 10 and 15/32 (rounded) At 100 yards the difference is .047 or 3/64.
a sub MOA rifle will group less than the MOA value at a given distance. If you can measure center to center on your group, or the maximum outside to outside of your bullet holes less one bullet diameter and the value is under 1 and 3/64 of an inch at 100 yards, you have a sub MOA rifle. Theoretically, you should the be capable of grouping less than 10 and 15/32 at 1000... but thats in theory only.
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04-16-2010, 09:08 AM
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No typo,, I didn't write out the whole equation, but in the end the difference between using 10" @ 1000 and 10.47 MOA @ 1000 is .47"
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04-16-2010, 09:16 AM
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Join Date: Mar 2009
Location: K'nadia, 'merica
Posts: 2,362
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Quote:
Originally Posted by noneck180
No typo,, I didn't write out the whole equation, but in the end the difference between using 10" @ 1000 and 10.47 MOA @ 1000 is .47"
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Geez, after the shot of the year discussion, nobody's cutting you any slack are they!
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04-16-2010, 09:23 AM
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Join Date: Feb 2008
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I didn't explain the conclusion good enough..
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04-16-2010, 02:56 PM
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Join Date: Jan 2010
Location: edmonton
Posts: 338
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I'm still confused, but its probably just the meds. Sorry wasnt trying to cause a fuss
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04-16-2010, 03:08 PM
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Join Date: May 2007
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Too much math , and not enough beer
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04-16-2010, 03:16 PM
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Banned
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Join Date: Feb 2008
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If you were to use MOA instead of 1"???? of which there is very little difference, the difference between using Inches and MOA at a 1000 yards is only .47" so if you want to call MOA an Inch by all means do it..
Sub MOA being under 1.047" or 1"
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