My 21" .30-06 is happy with 58 grains of H4350 and pretty much any of the 165's I've ever tried. Sierra's 165 Gameking is very accurate. Nosler's 165 Partition has worked well for me too. I'm seeing right at 2750 fps from my old rifle, with good accuracy. Hodgdon lists 59 grains of H4350 as max.
Forgot you asked about cases. I generally buy 50-packs of Winchester brass. It works well. Size it, trim it before use.
I had good luck w/ Win brass Imr 4350 and win or CCI primers out of my 22" Rem 700. Truth is that if you are looking for a 300 yard gun, the primer won't make much difference. win brass allows good case capacity and is pretty consistant and durable for a fair price. I would also favor H 4350 today because it is supposed to be a little less temperature sensative than IMR but both are great powders for the '06. I Actually used sierra match kings and had pretty good luck (have to admit that my rifle liked a pretty light load of powder though, and it is now retired awaiting cash for a new barrel and possibly cal).
good luck, mark
I used to re-load but now I "hand-load".
-- Well, at least I try --