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Rifles, Reloading, Optics, Equipment
Reloading
? on ES / SD
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<blockquote data-quote="piutemike" data-source="post: 209565" data-attributes="member: 9901"><p>In working up loads today for my 300RUM the best one I found with the 180 E-Tip was 96.2 gr. retumbo. I shot 2 groups with that load .632 and .685. Both groups were 3 shot groups. The velocity of those 6 shots was between 3284 and 3270, a ES of 14. </p><p> </p><p>My question is this, how do I figure the SD? Is there a simple way to do this? My chrono does not have this feature. </p><p> </p><p>I was quite pleased with these groups since it is a factory gun, skim bedded, trigger tuned, muzzle break and wyatts box added by Shawn and I don't consider myself a good shooter.</p><p> </p><p>Mike</p></blockquote><p></p>
[QUOTE="piutemike, post: 209565, member: 9901"] In working up loads today for my 300RUM the best one I found with the 180 E-Tip was 96.2 gr. retumbo. I shot 2 groups with that load .632 and .685. Both groups were 3 shot groups. The velocity of those 6 shots was between 3284 and 3270, a ES of 14. My question is this, how do I figure the SD? Is there a simple way to do this? My chrono does not have this feature. I was quite pleased with these groups since it is a factory gun, skim bedded, trigger tuned, muzzle break and wyatts box added by Shawn and I don't consider myself a good shooter. Mike [/QUOTE]
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Reloading
? on ES / SD
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