Thread: MOA definition View Single Post
 January 15, 1999, 02:38 PM #6 Michael Carlin Senior Member   Join Date: October 13, 1998 Location: Fredericksburg, VA USA Posts: 193 Pat has the definition and GLV (hi George) has the measurement for 100 yards. As Pat indicates a Minute is 1/60th of a degree and we all Know that a circle has 360 of those. SO: 360 degrees X 60 minutes per degree equals 21,600 minutes in a circle. The circumference of a circle equals Pi X Diameter or 3.14 X Diameter Diameter(equals 2X [the radius for a 100 yard MOA] (100 yards X 36 inches)= 7200 inches) So.. 3.14 X 7200 = 22608 inches around a circle of 200 yards in diameter. The circumference of 22608/21600 minutes in a circle = 1.047" subtended by an angle of One minute at a radius of 100 yards. Hence: One Minute of Angle = 1.047" at 100 yards One Minute of angle = 5.233" at 500 yards One Minute of Angle = 10.47" at 1000 yards No mystery here, just simple geometry. Hope this helps! ------------------ Ni ellegimit carborundum esse! Yours In Marksmanship http://www.1bigred.com/distinguished michael
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