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I know of a guy who has been professionally manufacturing powder for bloody years. with all the know how and safety etc in place, yet still he had one load in a ball mill go off and blow a double...

I got that from Van Tiel pyrotechnics.
id be surprised if it was not illegal to do so.
I had my pyro ticket and know that to manufacture pyro stuff you need the right ticket etc and magazine to...

You guys wanna be careful what you say online. it is illegal to manufacture powder without the proper permission slip from the gestapo. I mean from the Gummint.