PBB (Mike) is probably a lot like myself, I hate to throw away any old reloading manuals, and now I know why. I have had various people offer me some of their older reloading powders, and it's nice to be able to dig out a book to be able to use it. And like a couple of people stated, 452AA is a very fine (size wise), ball powder and seem to leak like a sieve from my older MEC reloader, even with the brass washer or not. It would find its way out. And when shooting the shells, it never seemed to burn totally, left a lot of residue in the barrels, looked like someone poured sand down the barrel !!! Mike* (MH*)