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Rifles, Reloading, Optics, Equipment
Reloading
Humidity and load developement
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<blockquote data-quote="Pdyson" data-source="post: 2336103" data-attributes="member: 74061"><p>I haven't but Michael Coppola did. In the not so distant past I have inadvertently left powder in my powder measure open to the air for weeks. 22% humidity change can affect velocity by 55fps. I thought it ok if I kept the bottle it came from next to the hopper. Started doing that to keep from dumping powder I could not remember what it was when I pored it. I bought a dehumidifier and a AC unit to keep my reloading area around 50-60%. If it's really high, I won't crack open a bottle. Here is a link to the test on H4350.</p><p>[URL unfurl="true"]https://chronoplotter.com/2021/08/19/how-does-humidity-affect-powder/?fbclid=IwAR2CYDmAzzoZzi7Cq8aYDmXEca609bGVnIHftlh9x_mBcthiWs6Zf5P4VyI[/URL]</p></blockquote><p></p>
[QUOTE="Pdyson, post: 2336103, member: 74061"] I haven’t but Michael Coppola did. In the not so distant past I have inadvertently left powder in my powder measure open to the air for weeks. 22% humidity change can affect velocity by 55fps. I thought it ok if I kept the bottle it came from next to the hopper. Started doing that to keep from dumping powder I could not remember what it was when I pored it. I bought a dehumidifier and a AC unit to keep my reloading area around 50-60%. If it’s really high, I won’t crack open a bottle. Here is a link to the test on H4350. [URL unfurl="true"]https://chronoplotter.com/2021/08/19/how-does-humidity-affect-powder/?fbclid=IwAR2CYDmAzzoZzi7Cq8aYDmXEca609bGVnIHftlh9x_mBcthiWs6Zf5P4VyI[/URL] [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Reloading
Humidity and load developement
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