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#3361706 - 09/16/13 06:29 PM Re: How Do You Measure MOA? [Re: ratsnakeboogy]
1shot1kill
4 Point


Registered: 09/06/01
Posts: 402
Loc: unicoi county tn us

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Thanks for the replies.
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#3362016 - 09/16/13 09:36 PM Re: How Do You Measure MOA? [Re: ratsnakeboogy]
infoman jr.
10 Point


Registered: 10/05/03
Posts: 3885
Loc: Elizabethtown, KY

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 Originally Posted By: ratsnakeboogy
 Originally Posted By: DaveB
That is good shooting Infoman.


Don't give him the big head, that group was shot with the rifle safely locked down in a robotic lead sled, computer actuated trigger, 11 feet from the muzzle.


JK


It's totally the rifle's fault. I just tried to stay out of the way!
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#3370608 - 09/23/13 06:51 AM Re: How Do You Measure MOA? [Re: infoman jr.]
Headhunter
10 Point


Registered: 11/14/00
Posts: 3966
Loc: LaVergne, TN USA

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nice shooting infoman.

savage 20 ga, first 3 shot group at 100 yards.

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#3373735 - 09/25/13 10:29 AM Re: How Do You Measure MOA? [Re: Headhunter]
Hunter 257W
10 Point


Registered: 10/04/12
Posts: 3165
Loc: Franklin County

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Center to center is the most direct way. I used to doubt how closely a person could measure the center of a ragged hole in paper until I tried measuring a number of groups repeatedly over time and writing down the results without knowing what my previous measurement was. I was amazed how repeatable the measurements were. You can easily repeat out to 2 decimal places(.01).

Of course outside to outside minus bore diamter will get you the same results.

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#3385791 - 10/03/13 07:48 AM Re: How Do You Measure MOA? [Re: Rubberduck270]
MUP
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Registered: 08/01/07
Posts: 44744
Loc: Just North of Chatt-town

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So my daughter shot two shots with her .243 yesterday at 100 yds. The ctc measurement was .375(scaled measurement, no calipers). Was this shooting 1/2 MOA then?
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Amateurs: Built the Ark

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#3385991 - 10/03/13 09:40 AM Re: How Do You Measure MOA? [Re: MUP]
infoman jr.
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Registered: 10/05/03
Posts: 3885
Loc: Elizabethtown, KY

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Ehhh kinda. Most people will talk about at least 5 shot groups when assessing a rifle's capability. You have to get enough shots to establish some kind of statistical significance.
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#3386068 - 10/03/13 10:27 AM Re: How Do You Measure MOA? [Re: infoman jr.]
Rubberduck270
10 Point


Registered: 11/01/10
Posts: 2783
Loc: Lawrence Co.

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With a hunting rifle, given it's generally lighter contour barrel, 3 consecutive shots is about max before barrel heat starts affecting performance. In a heavy barreled rifle, 5 shots (sometimes 5+) can be taken before the barrel absorbs enough heat to see changes. It's kind of a trade off though since the lighter contour barrel heats up faster it will also cool down faster.

But like infoman jr. said, anything under 3 shots doesn't really count. Had it been 3 shots at .375" center to center I'd say you have a keeper.
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#3386076 - 10/03/13 10:32 AM Re: How Do You Measure MOA? [Re: Rubberduck270]
MUP
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Registered: 08/01/07
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Loc: Just North of Chatt-town

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Well, actually I was referencing the .375" measurement, and normally would have shot 5 times myself, but had this been a 3-5 shot group, the .375" measurement would qualify as 1/2 MOA tho, correct?...as in the group would measure a sub 1.047/2 group. Is this how MOA is calculated?
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Amateurs: Built the Ark

Professionals: Built the Titanic

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#3386089 - 10/03/13 10:42 AM Re: How Do You Measure MOA? [Re: MUP]
Rubberduck270
10 Point


Registered: 11/01/10
Posts: 2783
Loc: Lawrence Co.

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Yes. She's 1/2 MOA on 2 shots.
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Smokeless Muzzleloading: It ain't your Grampa's flintlock

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#3386103 - 10/03/13 10:52 AM Re: How Do You Measure MOA? [Re: Rubberduck270]
MUP
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Registered: 08/01/07
Posts: 44744
Loc: Just North of Chatt-town

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Thanks!
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MUP

Amateurs: Built the Ark

Professionals: Built the Titanic

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