There is a bit of a difference between a BP plant exploding and a small ball mill exploding. Yes precautions need to be taken but a couple of tires and a few sand bags could effectively contain the blast from a half pound of BP. Which is the most I ever made at a time, last I did it.Jimmy10mm said:The fellow who invented Pyrodex was blown up in one of his plants back in the seventies IIRC. Reading either Earl Narramore or maybe it was Phil Sharpe, on the making of primers was a real eye opener.They wrote some classic books on reloading years ago. Reading that made me handle any of this stuff very carefully and I wouldn't dream of making my own BP. .