Thread: MOA definition
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Old January 15, 1999, 04:32 PM   #8
Art Eatman
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Join Date: November 13, 1998
Location: Terlingua, TX, USA
Posts: 22,540
Jeff: One other item in this is that group sizes are measured from center to center, not the distance from the outer edge of a bullet hole across to the farthest outer edge. It's just another convention which began Lord knows how many decades ago.

Another generalization is that a "one-minute" rifle reliably averages such a group (sometimes the jerk behind the trigger jerks the trigger), and the "standard" group is five shots.

Forty or fifty years ago, one MOA was regarded as really great in a hunting rifle. Today's precision machining makes it halfway commonplace.
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