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Rifles, Reloading, Optics, Equipment
Reloading
Magnum or standard primers.
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<blockquote data-quote="J E Custom" data-source="post: 1979612" data-attributes="member: 2736"><p>If you have a chronograph, let the load tell you what you need. The magnum primers will normally add velocity to the load but in the case of smaller cartridges they can also increase the SD's. with many mid size cartridges 60 to 80 grain of powder the standard large rifle will produce better Standard Deviations and slightly slower velocities. I have always chosen accuracy over velocity. So I look at SD's to get the most/best consistency which normally produces the best accuracy.</p><p></p><p>The larger cartridges that burn lots of slow burning powder almost always need the magnum primers But sometimes it is worth trying if you are not in extremely cold climates to improve accuracy.</p><p></p><p>The 7 STW's come to mind because they seem to like both magnum and standard primers depending on the powder and bullet combination. With the small cartridges, magnum primers can actually change the way faster burning powders react and increase the SD's to the point of inconsistency.</p><p></p><p>Good SD's indicate a good primer, powder and bullet combination and is always the place I start to develop accurate loads. After good SD's are found, for accuracy, I look at different bullet shapes and seating depths for best accuracy, by changing one thing at a time.</p><p></p><p>Start with standard primers and then If SD's aren't good try magnum primers. But always start with the recommended primer in the load data.</p><p></p><p>J E CUSTOM</p></blockquote><p></p>
[QUOTE="J E Custom, post: 1979612, member: 2736"] If you have a chronograph, let the load tell you what you need. The magnum primers will normally add velocity to the load but in the case of smaller cartridges they can also increase the SD's. with many mid size cartridges 60 to 80 grain of powder the standard large rifle will produce better Standard Deviations and slightly slower velocities. I have always chosen accuracy over velocity. So I look at SD's to get the most/best consistency which normally produces the best accuracy. The larger cartridges that burn lots of slow burning powder almost always need the magnum primers But sometimes it is worth trying if you are not in extremely cold climates to improve accuracy. The 7 STW's come to mind because they seem to like both magnum and standard primers depending on the powder and bullet combination. With the small cartridges, magnum primers can actually change the way faster burning powders react and increase the SD's to the point of inconsistency. Good SD's indicate a good primer, powder and bullet combination and is always the place I start to develop accurate loads. After good SD's are found, for accuracy, I look at different bullet shapes and seating depths for best accuracy, by changing one thing at a time. Start with standard primers and then If SD's aren't good try magnum primers. But always start with the recommended primer in the load data. J E CUSTOM [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Reloading
Magnum or standard primers.
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