Yes, 2F powder.
The powder is called LIDU Black Powder. Made in China by LIDU, and distributed by Corman Sporting Goods, Stanford, KY.
I bought several pounds cheap at a flea market. It comes in a plain silver can with plain black and white stick-on labels for labeling. It's probably crap black powder, but I expect it to be just fine for shotgun shells!
The shot is reclaimed shot from the local trap range, and of course the hulls are once-fired. (or twice-fired too)
Frugal all the way. If there was a way to reuse primers I would do that too!