Thanks for all the info. I've been reloading since 1975 and the reason I needed the input is because most of my reloading manuals were published before the .40 S & W round was invented. Like robocop10mm, I,ve used the older powders (Bullseye, Unique, 2400 and W-231) for the majority of my handgun loads. It looks as if I need to get some updated loading books. Thanks for the help.