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Old November 13, 2012, 11:24 AM   #3
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Join Date: June 20, 2007
Location: Starkville, MS
Posts: 6,530
No. All black powder and substitutes are extremely hygroscopic. If you really want to protect it from moisture, get yourself a food vacuum sealer and seal up your powder. You could go so far as to break up a new batch into quantities you would anticipate using during one range day.
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