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Rifles, Reloading, Optics, Equipment
Reloading
DuPont IMR 4320, IMR 4350, IMR4227
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<blockquote data-quote="Derfman" data-source="post: 2739047" data-attributes="member: 125828"><p>Old powder, although it is usable and might be reliable, does degrade over time and might not perform as listed in the old data. Where and how it's stored…temperature and humidity…type of container…matters more than the age of the powder…from what I have read. I think your powder container might have rusted, indicating some higher humidity storage. If you sniff it and it doesn't have a strong odor of ammonia,it's probably OK. </p><p></p><p>Brian Litz studied the effect of humidity and moisture content of gunpowder and the results were very surprising. </p><p></p><p>If you start low, and work up a load like you normally would, I think you'll be fine, and if anything, you'll come in a bit slower than what's shown in the older books.</p><p></p><p>I have other older manuals with more data; so holler if you need it.</p></blockquote><p></p>
[QUOTE="Derfman, post: 2739047, member: 125828"] Old powder, although it is usable and might be reliable, does degrade over time and might not perform as listed in the old data. Where and how it’s stored…temperature and humidity…type of container…matters more than the age of the powder…from what I have read. I think your powder container might have rusted, indicating some higher humidity storage. If you sniff it and it doesn’t have a strong odor of ammonia,it’s probably OK. Brian Litz studied the effect of humidity and moisture content of gunpowder and the results were very surprising. If you start low, and work up a load like you normally would, I think you’ll be fine, and if anything, you’ll come in a bit slower than what’s shown in the older books. I have other older manuals with more data; so holler if you need it. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Reloading
DuPont IMR 4320, IMR 4350, IMR4227
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