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I made bp when I was a kid and stumbled across a way to get the charcoal ground to where it worked better. Ground charcoal needs to be prism or crystal like.. I took two concrete blocks with a pan underneath. With a brick I crushed the charcoal and scraped it across the blocks. Since the two blocks were not completely joined the crushed charcoal fell though that slot into the pan. The rougness of the top of the blocks basically formed the charcoal granuals into the desired type of granuals to then be mixed w/ saltpeter and sulfer. I do not recommend this since I almost blew up my dads storage room etc. It was dangerous but I was playing. I was a kid. I wouldn't do it now!
WBH
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