Forums
New posts
Search forums
What's new
Articles
Latest reviews
Author list
Classifieds
Log in
Register
What's new
Search
Search
Search titles and first posts only
Search titles only
By:
New posts
Search forums
Menu
Log in
Register
Install the app
Install
Forums
Rifles, Reloading, Optics, Equipment
Reloading
Es and sd
JavaScript is disabled. For a better experience, please enable JavaScript in your browser before proceeding.
You are using an out of date browser. It may not display this or other websites correctly.
You should upgrade or use an
alternative browser
.
Reply to thread
Message
<blockquote data-quote="FearNoWind" data-source="post: 1172697" data-attributes="member: 50867"><p>Es (Extreme Spread) is the difference between the highest and lowest muzzle velocity in any test data group. If your MV is 2900 -2950 your ES is 50.</p><p>SD (Standard Deviation) is a avalue assigned to the dispersion in a group of numbers as measured from its mean. Put more directly, SD is the square root of the variance in a data set.</p><p><strong></strong></p><p><strong><a href="https://www.google.com/search?q=SD+formula&client=ubuntu&hs=pBd&channel=fs&source=lnms&tbm=isch&sa=X&ved=0ahUKEwjz6cyvvoDLAhUI5WMKHb8zDNgQ_AUIBygB&biw=1231&bih=895#imgrc=EWj_RcUArXWHWM%3A" target="_blank">https://www.google.com/search?q=SD+formula&client=ubuntu&hs=pBd&channel=fs&source=lnms&tbm=isch&sa=X&ved=0ahUKEwjz6cyvvoDLAhUI5WMKHb8zDNgQ_AUIBygB&biw=1231&bih=895#imgrc=EWj_RcUArXWHWM:</a></strong></p><p></p><p>The greater the ES, the higher the SD.</p><p>The answer to " how do I get to a good number?" in each of those categories should now be self evident.</p><p>I generally work to obtain a SD below 12 before I begin serious fine tuning of any load.</p></blockquote><p></p>
[QUOTE="FearNoWind, post: 1172697, member: 50867"] Es (Extreme Spread) is the difference between the highest and lowest muzzle velocity in any test data group. If your MV is 2900 -2950 your ES is 50. SD (Standard Deviation) is a avalue assigned to the dispersion in a group of numbers as measured from its mean. Put more directly, SD is the square root of the variance in a data set. [B] [url]https://www.google.com/search?q=SD+formula&client=ubuntu&hs=pBd&channel=fs&source=lnms&tbm=isch&sa=X&ved=0ahUKEwjz6cyvvoDLAhUI5WMKHb8zDNgQ_AUIBygB&biw=1231&bih=895#imgrc=EWj_RcUArXWHWM%3A[/url][/B] The greater the ES, the higher the SD. The answer to " how do I get to a good number?" in each of those categories should now be self evident. I generally work to obtain a SD below 12 before I begin serious fine tuning of any load. [/QUOTE]
Insert quotes…
Verification
Post reply
Forums
Rifles, Reloading, Optics, Equipment
Reloading
Es and sd
Top