I will add, Don't believe everything you read on the Internet OR everything you hear by Word of Mouth. I will note that for many, many years the old Ideal & then Lyman powder measures were all cast iron with a brass measuring cylinder & were recommended for use with black powder, in fact, they were introduced specifically for that purpose. I do not recall ever hearing of anyone experiencing an explosion from their use. I have measured a good bit of black with a Lyman #55 which is the measure Lyman decided neede to be replaced with the new measure having an aluminum tube.
Prior to Jim Legg's decease when he was an active member here he once showed a video of an experiment that someone had conducted. A "Static Spark generator was shown throwing a continuous stream of static sparks onto a pile of loose black powder & it did not ignite.
