Go Back   Alberta Outdoorsmen Forum > Main Category > Guns & Ammo Discussion

Reply
 
Thread Tools Display Modes
  #1  
Old 04-12-2010, 07:11 PM
KBF's Avatar
KBF KBF is offline
 
Join Date: Oct 2009
Location: WMU 108
Posts: 2,465
Default sub MOA?

What is sub moa?
Reply With Quote
  #2  
Old 04-12-2010, 07:16 PM
noneck180 noneck180 is offline
Banned
 
Join Date: Feb 2008
Posts: 1,076
Default

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.
Reply With Quote
  #3  
Old 04-12-2010, 07:18 PM
CoyoteChallenger's Avatar
CoyoteChallenger CoyoteChallenger is offline
 
Join Date: Dec 2008
Location: Cypress County, AB
Posts: 336
Default

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.
__________________
Should've Learned To Rope And Ride
Reply With Quote
  #4  
Old 04-12-2010, 07:27 PM
boomstick boomstick is offline
 
Join Date: Sep 2007
Location: st.albert
Posts: 409
Default 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.
Reply With Quote
  #5  
Old 04-12-2010, 07:34 PM
KBF's Avatar
KBF KBF is offline
 
Join Date: Oct 2009
Location: WMU 108
Posts: 2,465
Default

I just got my Remington 700 in 300WSM XCR. That would be great if it did that, but Im not that picky.
Reply With Quote
  #6  
Old 04-16-2010, 05:40 AM
switchsl switchsl is offline
 
Join Date: Jan 2010
Location: edmonton
Posts: 338
Default

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.
Reply With Quote
  #7  
Old 04-16-2010, 09:08 AM
noneck180 noneck180 is offline
Banned
 
Join Date: Feb 2008
Posts: 1,076
Default

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"
Reply With Quote
  #8  
Old 04-16-2010, 09:16 AM
Got Juice? Got Juice? is offline
 
Join Date: Mar 2009
Location: K'nadia, 'merica
Posts: 2,362
Default

Quote:
Originally Posted by noneck180 View Post
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"
Geez, after the shot of the year discussion, nobody's cutting you any slack are they!
__________________
Interests: Things that go Zoom, and things that go Boom.
'You can't fix stupid, but for a hundred bucks an hour, we sure can diagnose it"
Pay It Forward.. In Memory of Rob Hanson
Reply With Quote
  #9  
Old 04-16-2010, 09:23 AM
noneck180 noneck180 is offline
Banned
 
Join Date: Feb 2008
Posts: 1,076
Default

I didn't explain the conclusion good enough..
Reply With Quote
  #10  
Old 04-16-2010, 02:56 PM
switchsl switchsl is offline
 
Join Date: Jan 2010
Location: edmonton
Posts: 338
Default

I'm still confused, but its probably just the meds. Sorry wasnt trying to cause a fuss
Reply With Quote
  #11  
Old 04-16-2010, 03:08 PM
aulrich's Avatar
aulrich aulrich is offline
 
Join Date: May 2007
Posts: 3,112
Default

Too much math , and not enough beer
Reply With Quote
  #12  
Old 04-16-2010, 03:16 PM
noneck180 noneck180 is offline
Banned
 
Join Date: Feb 2008
Posts: 1,076
Default

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"
Reply With Quote
Reply


Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT -6. The time now is 02:31 PM.


Powered by vBulletin® Version 3.8.5
Copyright ©2000 - 2024, Jelsoft Enterprises Ltd.