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Rifles, Reloading, Optics, Equipment
Reloading
Standard Deviation & Extreme Spread - What does it take?
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<blockquote data-quote="Kansaswoodguy" data-source="post: 1333813" data-attributes="member: 83267"><p>I load five rounds each powder charge with .3gr differences in each charge weight tested in a 7mm mag you migh go to .5gr charge weight jumps and look for the load that shoots with the single digit SD if I don't find one I switch powders and try again. I prefer stick powders for accuracy and low SD's although I have had good luck with Superformance which is a ball powder. I do the same thing with seating depth of the bullets looking for best groups and low SD's. I have had bullets that a given gun just didn't like and powders that where not conducive to low SD's as well.</p></blockquote><p></p>
[QUOTE="Kansaswoodguy, post: 1333813, member: 83267"] I load five rounds each powder charge with .3gr differences in each charge weight tested in a 7mm mag you migh go to .5gr charge weight jumps and look for the load that shoots with the single digit SD if I don't find one I switch powders and try again. I prefer stick powders for accuracy and low SD's although I have had good luck with Superformance which is a ball powder. I do the same thing with seating depth of the bullets looking for best groups and low SD's. I have had bullets that a given gun just didn't like and powders that where not conducive to low SD's as well. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Reloading
Standard Deviation & Extreme Spread - What does it take?
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