Most economical powder I have bought and used is $5 a pound Pyrodex RS from the close out aisle at Walmart. Have bought several that way over the years. I have also used Pyrodex P, Goex 2f, 3f, & 4f, Scheutzen 2f, 3f, & 4f, and Swiss 2f, 3f, & 4f. I have purchased but have not used Triple 7 3f...