As for manuals, I have several editions of Hornady, as well as the Lyman 49th edition, and LEE and Nosler loading data.  If you're loading cast, Lyman has great data for cast bullet loads.  But when loading standard jacketed bullets, the Hornady 9th and 10th editions are my BIBLE!!! 

By the way... as for your 5.56 guys, there are a lot of people out there who will tell you that if you're not using Dillon (only the most expensive stuff), you're wasting your time.  To that I say, listening to someone tout Dillon... or any brand for that matter... would be "Wasting My Time!"  I only make suggestions for using LEE because it's inexpensive for beginners.  I mostly have LEE because I'm not rich, but I do also have Hornady and RCBS dies and equipment, and they all work great!  The bottom line is:  Buy/use what YOU are comfortable using!!!