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Hunting
The Basics, Starting Out
Rifle accuracy.
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<blockquote data-quote="med358-boise" data-source="post: 2609602" data-attributes="member: 123832"><p>3/4 MOA is a little on the high side. Better to be closer to 1/2 MOA. But let's suppose for a moment you have a 2/3 MOA rifle, before you "throw it away", consider the following in your analysis of your "1000 yard rifle".</p><p></p><p>The difference between a .66 MOA and a .5 MOA rifle is .84 inches of dispersion from POA.</p><p></p><p>Now consider the following for your 260 Remington with say a 143 ELDx at 2775 fps:</p><p></p><p>A 5 yard error in range estimation equals 3.8 inches of "drop error"</p><p></p><p>A 15% aggrgegate wind error even at 2 mph is 1.4 inches of "windage error". Note you estimate wind across the flight path is 2 mph of full value but it is really 2.3 mph of full value wind.</p><p></p><p>A 6 fps variance (12 fps of ES) in velocity is 1.2 inches of "drop error".</p><p></p><p>Assuming your scope has 1/4 MOA adjustments, on average you will be 1/8th of an MOA off which equals 1.3 inches of "inherent error".</p></blockquote><p></p>
[QUOTE="med358-boise, post: 2609602, member: 123832"] 3/4 MOA is a little on the high side. Better to be closer to 1/2 MOA. But let's suppose for a moment you have a 2/3 MOA rifle, before you "throw it away", consider the following in your analysis of your "1000 yard rifle". The difference between a .66 MOA and a .5 MOA rifle is .84 inches of dispersion from POA. Now consider the following for your 260 Remington with say a 143 ELDx at 2775 fps: A 5 yard error in range estimation equals 3.8 inches of "drop error" A 15% aggrgegate wind error even at 2 mph is 1.4 inches of "windage error". Note you estimate wind across the flight path is 2 mph of full value but it is really 2.3 mph of full value wind. A 6 fps variance (12 fps of ES) in velocity is 1.2 inches of "drop error". Assuming your scope has 1/4 MOA adjustments, on average you will be 1/8th of an MOA off which equals 1.3 inches of "inherent error". [/QUOTE]
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The Basics, Starting Out
Rifle accuracy.
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