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Rifles, Reloading, Optics, Equipment
Reloading
? on ES / SD
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<blockquote data-quote="goodgrouper" data-source="post: 209769" data-attributes="member: 2852"><p>For all intensive purposes relating to figuring a load's capability, the sd will "basically" be half the extreme spread on a three shot group unless your chrono reads in half feet per second and not many do.</p><p></p><p>And if someone says that ES is everything and SD means nothing, they don't fully comprehend the fact that the two are intertwined to the point that either both are meaningful or both are meaningless.</p><p></p><p></p><p>My only gripe with holding ES as the holy grail of data is this:</p><p></p><p>Say you fire ten shots and they read </p><p>3000, 3001,3000,3003,3002,3000,3001,3005,3002, and then the last shot had a little tighter neck tension and it went 3050 fps. The ES method would show this load to have a spread of 50 fps and unless you went back and looked at each individual shot speed, you would think this load stunk. But the SD would still show this load kicked some serious butt. That is why both ES and Sd are helpful to have and therefore why both are included in the circuitry of modern chronographs.</p></blockquote><p></p>
[QUOTE="goodgrouper, post: 209769, member: 2852"] For all intensive purposes relating to figuring a load's capability, the sd will "basically" be half the extreme spread on a three shot group unless your chrono reads in half feet per second and not many do. And if someone says that ES is everything and SD means nothing, they don't fully comprehend the fact that the two are intertwined to the point that either both are meaningful or both are meaningless. My only gripe with holding ES as the holy grail of data is this: Say you fire ten shots and they read 3000, 3001,3000,3003,3002,3000,3001,3005,3002, and then the last shot had a little tighter neck tension and it went 3050 fps. The ES method would show this load to have a spread of 50 fps and unless you went back and looked at each individual shot speed, you would think this load stunk. But the SD would still show this load kicked some serious butt. That is why both ES and Sd are helpful to have and therefore why both are included in the circuitry of modern chronographs. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Reloading
? on ES / SD
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