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Hunting
The Basics, Starting Out
Mill or MOA
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<blockquote data-quote="QuietTexan" data-source="post: 2144421" data-attributes="member: 116181"><p>Right, I didn't actually show any math on deriving the unit, but once people see it it tends to click pretty fast.</p><p></p><p>At 1,000 yards, a radian is 1,000 yards wide. 1/1000ths of that is 1 yard. A yard is 36". Thus one mil at 1000 yards is 36 inches.</p><p>At 100 yards, a miliradian is 1/1000th of the distance, or 100/1000, aka 1/10th, aka 0.1 yard wide. A tenth of 36 inches is 3.6 inches.</p><p></p><p>The 0.1 per 100 becomes as rote a memory as 1in at 100 for MOA. A mil is a tenth of a yard per 100 yards. Or about half a vital zone per 100, in deer terms.</p><p></p><p>It breaks down in imperial units very cleanly because it's easier to multiply and divide by even 10s than by 4s in your head regardless of what the base unit is.</p></blockquote><p></p>
[QUOTE="QuietTexan, post: 2144421, member: 116181"] Right, I didn't actually show any math on deriving the unit, but once people see it it tends to click pretty fast. At 1,000 yards, a radian is 1,000 yards wide. 1/1000ths of that is 1 yard. A yard is 36". Thus one mil at 1000 yards is 36 inches. At 100 yards, a miliradian is 1/1000th of the distance, or 100/1000, aka 1/10th, aka 0.1 yard wide. A tenth of 36 inches is 3.6 inches. The 0.1 per 100 becomes as rote a memory as 1in at 100 for MOA. A mil is a tenth of a yard per 100 yards. Or about half a vital zone per 100, in deer terms. It breaks down in imperial units very cleanly because it's easier to multiply and divide by even 10s than by 4s in your head regardless of what the base unit is. [/QUOTE]
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The Basics, Starting Out
Mill or MOA
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