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Chronograph ES and SD
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<blockquote data-quote="J E Custom" data-source="post: 286648" data-attributes="member: 2736"><p>What you are looking for is a SD in the single digit's (ES will improve as SDs go down) "AND" </p><p>good groups.</p><p></p><p>At short distances you can have good groups and poor SDs but at long distances the groups </p><p>will fall apart. </p><p></p><p>In order to have good groups at long distance you will have to find a load that has=Good</p><p>velocity,good SDs,groups well at 300+yards and a bullet with a high ballistic coefficient.</p><p></p><p>When I start working up a load I always start with the chronograph to get the best SDs</p><p>(This tells me that I have a good powder, primer and bullet weight combination. then I experiment with bullet seating depth to improve accuracy.</p><p></p><p>J E CUSTOM</p></blockquote><p></p>
[QUOTE="J E Custom, post: 286648, member: 2736"] What you are looking for is a SD in the single digit's (ES will improve as SDs go down) "AND" good groups. At short distances you can have good groups and poor SDs but at long distances the groups will fall apart. In order to have good groups at long distance you will have to find a load that has=Good velocity,good SDs,groups well at 300+yards and a bullet with a high ballistic coefficient. When I start working up a load I always start with the chronograph to get the best SDs (This tells me that I have a good powder, primer and bullet weight combination. then I experiment with bullet seating depth to improve accuracy. J E CUSTOM [/QUOTE]
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