Mods, if this is the wrong section for this post please move it with my apologies.
I have come into some older powder that I’d like to identify. I was given a bag full of a couple hundred hand loaded .38 Specials. The boolits are about 125gr and powder charge is about 3.9gr. The powder in question is dark grey with small circular granules with a tiny perforation in the center. They look like dark miniature Trailboss granules. Does anyone recognize it?