Last night, I was in the process of demilling some cartridges I had found in the "DUDS" canister at our club's pistol range, when I came across a (presumably handloaded) .38 Special round containing this most unusual looking powder:
I was curious as to what kind of powder this was, and did a Google search using keywords like gunpowder, flake, hole in middle, and looks like monochromatic Cheerios. No joy. I even did a Goodle image search using the picture above but that only returned links to cooking-related websites.
So, does anyone here who's been handloading longer than I know what kind of powder this is?