Re: Best powder for \'06?
H4350 extreme has been my favorite powder for the 165/168gr and 30-06. Burns clean, very accurate and vel what you expect.
Also, when hunting in the cold, vel. stay the same as warmer weather. Drop tables stay pretty much the same.
I have also found match primers (CCI BR2) to really help my long range groups.
If looking for more brass, I have had wonderful luck with the surplus Lake City LC69 brass available for cheap. Very durable, and consistent. Shooting sub MOA out of my hunting rifle to 600yds (3 rd groups).