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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
What does MOA means?
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<blockquote data-quote="Mikecr" data-source="post: 1150771" data-attributes="member: 1521"><p>OP don't let rounded Inches per hundred yards(IPHY, hunter's MOA) distract you too far from the actual MOA standard.</p><p>The .047" added to 1.000" absolutely becomes significant at distance & dialing ~40MOA+.</p><p>For example, 750yd shot with 40 IPHY dialed, instead of 40 MOA per ballistic solution. </p><p>The 40 dialed would carry an error of .047 x 40 =1.89 IPHY(from actual MOA) x 7.5 = 14.16"</p><p>With this much error from nothing more than lack of understanding -you probably shouldn't be taking hunting shots so far. </p><p>Groundhogs wouldn't even notice my shots if I did this..</p><p></p><p>It's generalizations here, especially in merchandising, that has led to most scopes not actually dialing in true MOA(even while advertised as 1/4moa adjustment, etc.). So we counter by testing our scopes to discover their true IPHY per click and entering this in our ballistic software.</p><p>Only when each '1/4moa click' actually measures 0.262" at 100yds, do we enter 1/4moa per click.</p><p></p><p>This is a LR hunting site, and not a competition shooting site. </p><p>As LR hunters we're not bound by arbitrary and fixed standards. We must account for realities in our capabilities.</p><p>Another example; in group measure IBS subtracts cal from group diameter. That is, they subtract .243" from a group shot with a 6mm. This is dead wrong, they should be subtracting a 6mm bullet hole, produced by that target paper, from group diameter. Try it sometime, it's a significant difference,, then consider all the 'world records' that have been recorded inaccurately.</p></blockquote><p></p>
[QUOTE="Mikecr, post: 1150771, member: 1521"] OP don't let rounded Inches per hundred yards(IPHY, hunter's MOA) distract you too far from the actual MOA standard. The .047" added to 1.000" absolutely becomes significant at distance & dialing ~40MOA+. For example, 750yd shot with 40 IPHY dialed, instead of 40 MOA per ballistic solution. The 40 dialed would carry an error of .047 x 40 =1.89 IPHY(from actual MOA) x 7.5 = 14.16" With this much error from nothing more than lack of understanding -you probably shouldn't be taking hunting shots so far. Groundhogs wouldn't even notice my shots if I did this.. It's generalizations here, especially in merchandising, that has led to most scopes not actually dialing in true MOA(even while advertised as 1/4moa adjustment, etc.). So we counter by testing our scopes to discover their true IPHY per click and entering this in our ballistic software. Only when each '1/4moa click' actually measures 0.262" at 100yds, do we enter 1/4moa per click. This is a LR hunting site, and not a competition shooting site. As LR hunters we're not bound by arbitrary and fixed standards. We must account for realities in our capabilities. Another example; in group measure IBS subtracts cal from group diameter. That is, they subtract .243" from a group shot with a 6mm. This is dead wrong, they should be subtracting a 6mm bullet hole, produced by that target paper, from group diameter. Try it sometime, it's a significant difference,, then consider all the 'world records' that have been recorded inaccurately. [/QUOTE]
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What does MOA means?
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