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Hunting
Extreme Long Range Hunting & Shooting (ELR)
Mil vs MOA
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<blockquote data-quote="Hugnot" data-source="post: 2300431" data-attributes="member: 115658"><p>Depends....</p><p></p><p>the math being:</p><p>pi = 3.14</p><p>the range is = the radius of a circle</p><p>360 degrees * 60 min/per degree = 21,600 minutes in a circle</p><p>the circumference of a circle = 2 * pi * radius</p><p>for a 100 yard circle: circumference in inches = 2 * 3.14 * 3600 = 22,608</p><p>1 true MOA at 100 yards = 22,608/21,600 = 1.047 inches</p><p>1 true MOA at 600 yards = (2 * 3.14 * 21,600) / 21,600 = 6.28 inches</p><p>1 true MOA at 1000 yards = (2 * 3.14 * 36,000 ) / 21,600 = 10.47 inches</p><p></p><p>What if a scope maker decides to make scopes using exactly 4 clicks for 1" @ 100, 1/4 " per click; 4 clicks for 6" @ 600, 1.5" per click; 4 clicks for 10" @1000, 2.5" per click.</p><p>Then mark the dials on the scope "1/4 MOA" then shows 4 spaces between drum hash marks. This would simplify shooting at targets having known diameter features like 5" X rings @ 1,000 yards.</p><p></p><p>But what if a shooter is some Euro guy that has been using the metric system since age 6?</p><p></p><p>1 mrad = 10 cm @ 100 meters</p><p>1 mrad = 50 cm @ 500 meters</p><p>1 mrad = 100 cm @ 1 klick (1,000 meters)</p><p></p><p>The scope has .1 mrad clicks so:</p><p></p><p>1 click = 1 cm @ 100M, 5 cm @ 500M, 10 cm @ 1 klick (1000 meters)</p><p></p><p>1 inch = 2.54 cm</p><p>so:</p><p>100 meters 1 click = .39 inches, 500 meters 1 click = 1.97 inches, 1 klick 1 click = 3.94 inches</p><p></p><p>the mrad system may be used with inches & yards, like 500 yards, (500 * 36) /1,000 = 18 inches between mil dots.</p><p></p><p>for shooting at paper targets at known ranges, I like MOA's</p><p></p><p>for field shooting I like mrad scopes having .1 rad adjustments and mrad reticles (mil dots)</p></blockquote><p></p>
[QUOTE="Hugnot, post: 2300431, member: 115658"] Depends.... the math being: pi = 3.14 the range is = the radius of a circle 360 degrees * 60 min/per degree = 21,600 minutes in a circle the circumference of a circle = 2 * pi * radius for a 100 yard circle: circumference in inches = 2 * 3.14 * 3600 = 22,608 1 true MOA at 100 yards = 22,608/21,600 = 1.047 inches 1 true MOA at 600 yards = (2 * 3.14 * 21,600) / 21,600 = 6.28 inches 1 true MOA at 1000 yards = (2 * 3.14 * 36,000 ) / 21,600 = 10.47 inches What if a scope maker decides to make scopes using exactly 4 clicks for 1" @ 100, 1/4 " per click; 4 clicks for 6" @ 600, 1.5" per click; 4 clicks for 10" @1000, 2.5" per click. Then mark the dials on the scope "1/4 MOA" then shows 4 spaces between drum hash marks. This would simplify shooting at targets having known diameter features like 5" X rings @ 1,000 yards. But what if a shooter is some Euro guy that has been using the metric system since age 6? 1 mrad = 10 cm @ 100 meters 1 mrad = 50 cm @ 500 meters 1 mrad = 100 cm @ 1 klick (1,000 meters) The scope has .1 mrad clicks so: 1 click = 1 cm @ 100M, 5 cm @ 500M, 10 cm @ 1 klick (1000 meters) 1 inch = 2.54 cm so: 100 meters 1 click = .39 inches, 500 meters 1 click = 1.97 inches, 1 klick 1 click = 3.94 inches the mrad system may be used with inches & yards, like 500 yards, (500 * 36) /1,000 = 18 inches between mil dots. for shooting at paper targets at known ranges, I like MOA's for field shooting I like mrad scopes having .1 rad adjustments and mrad reticles (mil dots) [/QUOTE]
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