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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
MOA Ranging Formula
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<blockquote data-quote="7magcreedmoor" data-source="post: 952631" data-attributes="member: 48559"><p>When using quick math to calculate in your head, beyond a certain range you need to start correcting for the rounding off error- the flatter your load shoots, the farther out you can get by with quick calc, but the round off will get you eventually. After doing the quick math (30in target divided by 6MOA times 100 equals 500 yards) you need to subtract 4.5% to get rid of the rounded off MOA. The 22.5 yard difference can cost you the shot that far out, maybe even closer depending on your load. Or you can use 95.5 instead of 100 if you have a calculator, or are much more confident with your mental math than I can ever be...</p><p> </p><p>I cheat and lop off 5yds per hundred if I have no calculator. Still a little round off, but can get a bit farther out before it gets me.</p></blockquote><p></p>
[QUOTE="7magcreedmoor, post: 952631, member: 48559"] When using quick math to calculate in your head, beyond a certain range you need to start correcting for the rounding off error- the flatter your load shoots, the farther out you can get by with quick calc, but the round off will get you eventually. After doing the quick math (30in target divided by 6MOA times 100 equals 500 yards) you need to subtract 4.5% to get rid of the rounded off MOA. The 22.5 yard difference can cost you the shot that far out, maybe even closer depending on your load. Or you can use 95.5 instead of 100 if you have a calculator, or are much more confident with your mental math than I can ever be... I cheat and lop off 5yds per hundred if I have no calculator. Still a little round off, but can get a bit farther out before it gets me. [/QUOTE]
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MOA Ranging Formula
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