I'm in the same boat, trying to figure out the first powders to buy, except I'm doing .223 and .308.
I was planning on going with Varget and H335. My speer manual uses both for lots of different loads, as does the IMR/HODGDON loading data on their website.
Yup, there is plenty of data on the site.
Varget is great in those two calibers but it can sometimes be sold out. Have you tried H4895? It works great in those two calibers (and others), is always in stock and seems to be a great all around powder. I think I actually get better groups with that over Varget in .223.