My latest manual is the Hornady 9th edition! I also have older Speers(back to #1), Sierra, Hodgon, Nosler, and many small publications! I was looking for information using the newer powders because the older manuals don't have the newer powders. I also have a large selection of powders from experimenting with 22 wildcats but I'm extremely new to the .257 cals!
jcelect