old surplus powder is not worth the trouble to reload. Un marked powder is not worth the trouble of blowing up a weapon. Now there is a mathematical method to figure out a load to the powder. Is it possible? yes. But unless you have a very large amount feed the garden. My dad is super cheep an talks of using unknown powder after the war. When 10 pound boxs were a few dollars. We have good powder now that will now hurt us.
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