What happens if you want to use bullets from more than 1 manufacturer?
I bought the Lyman Manual and The ABC's of reloading and read them both thoroughly, I now use load data from the powder or bullet manufacturers that have data available on line, it is more up to date; for example the max load 140 gr bullet / N160 load data has been revised by Viht and Nosler and is 3 gr - 7.5% - LOWER than that given in my Lyman manual.
Alliant, Ramshot, Nosler, Hodgdon all give load data on line I'm sure there are others.
But don't be tempted to skip straight to website without a book, the books will explain all of the safety procedures and these really are important, especially if you like your face!