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Old June 30, 2018, 08:41 PM   #2
JohnKSa
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Join Date: February 12, 2001
Location: DFW Area
Posts: 22,244
A group with a 2" circumference at 100 yards would be a lot less than 2MOA--it would be something like 0.6 MOA

Generally groups are measured between the centers of the two shots that are farthest apart. So the group measurement would be more like a diameter than a circumference. Nothing wrong with measuring a circumference, it's just not the way most folks do it.

A 2 MOA group would have a diameter of about 2" at 100 yards--a circumference of about 6.3".

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An MOA (Minute Of Angle) is generally approximated as 1" at 100 yards. It would be about 2" at 200 yards, about 0.5" at 50 yards and so on.

1MOA is really about 1.047" at 100 yards, but it's rare for people to get down to that level of precision.
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