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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
What does MOA means?
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<blockquote data-quote="Bart B" data-source="post: 1151414" data-attributes="member: 5302"><p>It's has never meant everything in bullseye long range matches. Never ever heard anyone talk, worry or mandate any such thing. Traditionally, it means nothing.</p><p></p><p>Nor do I comprehend how it would matter in group shooting at long range. Especially when the groups are measured in inches and the stat office doesn't know exactly how much each competitor's scope adjustments are to the nth degree of adjustment per click. Ahd the best of them cannot read wind condition changes accurately to less than 1/3 MOA. The backlash error for most scopes with a +/- 1 click change is a lot more than the ~1/20th MOA difference between simplified MOA vs exact MOA.</p><p></p><p>Consider long range matches shooting M1 or M14 service rifles. Garands with their Nat'l Match rear sight up 10 clicks from the bottom move bullet impact for 2 clicks about 10.24" at 1000 yards per click zeroed at that range. Who really does care that it's not exactly 10.47197536428328546947470696664 inches for 2 clicks of windage? </p><p></p><p>Nobody can read condition changes precisely enough for 1000-yard stuff to warrant any adjustment causing any less than 3 to 4 inches. The US Palma Team rifles have sights with about 1/2 MOA clicks.</p><p></p><p>So, Gary, maybe you could explain the details of how one would manage exact numbers "meaning everything" in a long range match and consistently get better results than using approximations that have worked very well for decades. Then, maybe, I'll understand.</p></blockquote><p></p>
[QUOTE="Bart B, post: 1151414, member: 5302"] It's has never meant everything in bullseye long range matches. Never ever heard anyone talk, worry or mandate any such thing. Traditionally, it means nothing. Nor do I comprehend how it would matter in group shooting at long range. Especially when the groups are measured in inches and the stat office doesn't know exactly how much each competitor's scope adjustments are to the nth degree of adjustment per click. Ahd the best of them cannot read wind condition changes accurately to less than 1/3 MOA. The backlash error for most scopes with a +/- 1 click change is a lot more than the ~1/20th MOA difference between simplified MOA vs exact MOA. Consider long range matches shooting M1 or M14 service rifles. Garands with their Nat'l Match rear sight up 10 clicks from the bottom move bullet impact for 2 clicks about 10.24" at 1000 yards per click zeroed at that range. Who really does care that it's not exactly 10.47197536428328546947470696664 inches for 2 clicks of windage? Nobody can read condition changes precisely enough for 1000-yard stuff to warrant any adjustment causing any less than 3 to 4 inches. The US Palma Team rifles have sights with about 1/2 MOA clicks. So, Gary, maybe you could explain the details of how one would manage exact numbers "meaning everything" in a long range match and consistently get better results than using approximations that have worked very well for decades. Then, maybe, I'll understand. [/QUOTE]
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What does MOA means?
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