Do these count as multiple sources?
For every caliber that I reload for, I have one of these books (see pic). I also have Lee's reloading manual. Since there are loading data in these spiralbound books from Hornady, Speer, Sierra, Nosler, Hodgdon's, Accurate, etc.....does this book count as 6 or more sources? I mean, everyone says, "you need 2 or 3 sources for loading data before you can confidently work up a load." By buying one of these books, does a person have enough info to work with? What will the other source manuals tell you about powder weight that this one doesn't? Thanks again.