I have a chance to buy some powder at a decent price. The choices are Clays, Universal, and International. I've never used any of these. What are they good for? I used to load for .38/.357, 9mm P, .45 ACP, .44 Spl/.44M, and 12 and 20 gauge. I should say I have the equipment to do so but haven't reloaded for years. Previously I used powders like Unique, Bullseye, and 2400 and WW powders for shotshells.