I have been out of reloading for about 20 years. I loaded when we had basicly 4 powders. Bullseye and Unique for pistol, 2400 for rifle and Green Dot for shotguns. New (for me) powders are different. My question is, Is there a difference in Universal, Clays Universal, or Universal Clays? I have Hornaday, Sierra, and Lee manuals and each lists these for .40 S&W but I was wondering if there was a difference.