Deer are no harder to kill than a man and the .308 has been doing that in war for a long time. While the Nosler Partition is a great bullet IMO it's overkill when hunting deer. I personally don't like spending money I don't need to spend. What bullet were you buying before you loaded? Did it do a good job? Use that bullet to load in your ammo.
As for powders, like you said the .308 is a lot like the 30-06 but not exactly. My favorite powder is IMR4064 but Varget is also a very good choice. That said, you already have a powder that is very highly regarded as a excellent .308 powder by those who shoot at Camp Perry, AA2520. You will be very happy loading AA2520 in your .308 ammo.
For deer I like several bullet including the 165gr Sierra GameKing bullet. I also like Remington Core-Lokt bullet. It has been putting meat on the table for a very long time. Nosler Ballistic Tip bullets work just fine as does the Speer Hot-Cor bullets.
The Nosler Partition, Nosler AccuBond, Barnes Triple-Shock, the Swift Scirocco and the like are all excellent bullets. Of course you can use the premium bonded bullets but at what cost? In reality, there really isn't a bad bullet out there that's made by a name brand manufacturer.