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Rifles, Reloading, Optics, Equipment
Reloading
Powder
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<blockquote data-quote="Greyfox" data-source="post: 2230710" data-attributes="member: 10291"><p>While I have successfully done this, I will generally try to avoid mixing lots of powder. </p><p>For my LRH and competition loads I have blended when the measured velocities and ES of my loads for "each" powder are within 10FPS. The potential issue, in my experience, is that if the velocities differ much more then this the ES often ends up not averaging, but spanning the two powders, thus increasing the ES of the mixed powders. Not an issue for mid-range work, but problematic at the longer distances. </p><p>Additionally, if the established load is running at max pressure, it would be wise to know the what the individual lots(new) max pressure/velocity is to avoid an over pressure situation with the blend. I have seen different lots of the same powder exhibit velocity differences as high as 40-50FPS with the same charge weight.</p></blockquote><p></p>
[QUOTE="Greyfox, post: 2230710, member: 10291"] While I have successfully done this, I will generally try to avoid mixing lots of powder. For my LRH and competition loads I have blended when the measured velocities and ES of my loads for “each” powder are within 10FPS. The potential issue, in my experience, is that if the velocities differ much more then this the ES often ends up not averaging, but spanning the two powders, thus increasing the ES of the mixed powders. Not an issue for mid-range work, but problematic at the longer distances. Additionally, if the established load is running at max pressure, it would be wise to know the what the individual lots(new) max pressure/velocity is to avoid an over pressure situation with the blend. I have seen different lots of the same powder exhibit velocity differences as high as 40-50FPS with the same charge weight. [/QUOTE]
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