I have been loading for more than 3 decades now. No matter what the cartridge, you can't have one manual.
Personally I like to just read them sometimes. Get the different perspectives on a cartridges development, etc.
Most of my newer manuals are at the other house but the ones here are as follows:
Speer #12 has 4
Lyman #44 has 4
Lyman #48 has 5
Lyman Cast #4 has 4
Hornady 3rd has 1
Hornady 4th has 2
Modern Reloading 2nd has 12
Alliant 2000 has 3
Alliant 2002 has 3
Alliant 2005 has 3
Alliant 2010 has 4
IMR 2001 has 2
IMR unknown has 2
Winchester 2001 has 2
Vihtavuori 2002 has 2
Vihtavuori 2012 has 2
Hodgen 2009 has 2
Accurate #3.5 has 9
Ramshot has 7
My advice is start with the powders that you have onhand and see what data those manufacturers offer.
The go to the projectile that you have chosen to load and see what those guys offer.
You always have the user contributed sights line Handloads.com. They have many loads. However you need to temper what you read against experience or manuals