I go to all of the bullet and powder mfgrs websites and print out there reloading data catalogs. That's harder to do for hodgdon, but Alliant, Sierra, nosler, Accurate, etc are available online. I use Lyman's 49 when I can't find a powder that I want to use listed in the other books or as a second check on safe loads. I have found mistakes in several manuals...
I have the nosler book and the hornady book. Both are good, but the loads in the hornady seem a bit "cautious" sometimes.
If I could only have one manual, it would be Lyman 49th edition, it has a great variety of loads, calibers, and powders represented, including cast bullet loads for most calibers...
