Chuckwagon, if you're dead set on using 200-grain bullets in a .30-06 (and I'm sure you have your reasons), then I'd probably try the Partition first. The reason I say this is not to suggest that the Partition will perform better on animals. In fact, both are supposed to perform almost identically.
No, the reason I say this is because the 200 Accubond is a loooonnngg bullet. It is actually the longest bullet that Nosler makes. I tried them last year in my .300 Winchester Magnum at about 2,850 feet-per-second and they would not shoot accurately beyond 100 yards. My theory is that the twist (1-10") and velocity were not enough to properly stabilize those bullets. Nosler themselves apparently recommend a barrel twist of 1-9" for these bullets, or an Ultramag kind of velocity. I'd be inclined to believe them on this. I know that some people have had good luck with 200-grain Accubonds in lesser cartridges, but it's probably a bit of a gamble.
For myself, I went down to a 180 Accubond in my .300 Winchester at 3,060 f.p.s. and the accuracy is simply incredible -- under 1/2 m.o.a. for three shots at 200 metres. Last fall I placed that bullet perfectly in the center of a mule deer's spine from a lasered 250 yards down a steep canyon and the result was decisive and spectacular.
The 200-grain Partition, by contrast, is a little shorter, and it is a proven performer out of .30-06 barrels. It's pretty well guaranteed to work in your .30-06, assuming you use the right load and your rifle/scope are up to snuff.
As for powders, I'd go with either H4831SC, Reloder 22, or my personal favourite these days -- Vihtavuori N560, which should outperform the others.
