In addition to the above listed powders including all the versions of 4350, I REALLY like IMR 4831 for 165 and 180 gr loads. I'm just trying them but you might want to check out Alliant R19 and R22 as several load manuals show great performance with these powders.
Its an older powder but I'm having great results with H450 and 180 gr Nosler Ballistic Tips.
There are a lot of suitable powders out there. Seems like Rifle or Handloader Magazine had an article about the 300 Win recently - don't remember the month.
Good luck. Check out a few manuals and you should find some good recipes.