Since you're still relatively new to this, getting another good manual (or a couple of Loadbooks) makes sense.
When you get to where you feel your learning curve is leveling off, set aside some money to get a copy of Ken Waters' "Pet Loads." It's a compendium of articles he wrote and published about....just about everything.
New powders, older powders, this, that, and everything else.
This tome--and "Tome" is the correct term--has over 1000 pages of "pet loads," what worked, what didn't, how well, you name it.
It's not cheap--$42.25 on Amazon--but it's well-worth the money, IMO. Might be a great present for someone to leave for you.