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Rifles, Reloading, Optics, Equipment
Reloading
Es/sd
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<blockquote data-quote="ShtrRdy" data-source="post: 1144512" data-attributes="member: 40852"><p>ES - stands for extreme spread. This pertains to the velocity measured from a group of cartridges and describes what the difference is between the highest velocity and lowest velocity.</p><p> </p><p>SD - stands for Standard Deviation. This also applies to the velocity measured from a group of cartridges. It's a statistical estimation of the probability that the velocity of the next cartridge fired will be within some range of velocity.</p><p> </p><p>These sorts of things are mostly important for long range shooting because a different velocity will result in the bullet impacting higher or lower.</p></blockquote><p></p>
[QUOTE="ShtrRdy, post: 1144512, member: 40852"] ES - stands for extreme spread. This pertains to the velocity measured from a group of cartridges and describes what the difference is between the highest velocity and lowest velocity. SD - stands for Standard Deviation. This also applies to the velocity measured from a group of cartridges. It's a statistical estimation of the probability that the velocity of the next cartridge fired will be within some range of velocity. These sorts of things are mostly important for long range shooting because a different velocity will result in the bullet impacting higher or lower. [/QUOTE]
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