Any well recognized standard loading for the 180gr Nosler will get the job done.
My preference is for Reloader-22
It gives best accuracy from my gun. Approaching 1 hole 3-shot groups @100yds, with some old Speer 180gr Hot-Cor's, which I used for bear on a Canadian spring bear hunt in New Brunswick, Canada in 1988.
I used at that time 58.0gr of H4831, as that's all I could get in my Norma cases. Velocity ran just about 2,700fps. Accuracy was about 1", but not as fast or accurate as the RL-22.
Most factory ammo actually chrono's about 2,575 to 2,650 so don't let folks decieve you about what an '06 really gets with 180's. I've not seen 2,800fps without getting pressure signs. Not something you want if your quarry can "bite back".
But don't let that deter you. The Nosler 180gr Partition has a wonderful reputation gained at that velocity.
My load of 60.0gr of RL-22 runs 2,785fps from my 24"bbl Interarms MkX. (or did before I removed it and rebarreled to .338/06). I also have a Midland Arms (Parker-Hale '98 action) with a 24" bbl that runs it to 2,770. So, it is a consistent load, and consistantly accurate load in different rifles.
As one of the better gun writters has written.......
If you can't get it done with a 180gr Nosler from a .30/06; maybe you need to rethink what your'e doing.
In Upper Maine, and in Eastern Canada, the .30/30 with 170gr Corlokts and the .35Rem with 200gr Corlokts have an enviable reputation for putting down the bears.
Placing your shot "exactly" is much more important than 100+/- fps of velocity.
The .30/06 with 180gr Noslers can't be beat. They give much better initial impact performance than the Barnes X bullets. Especially if you don't hit major bones. They have wider wound channels, and perhaps a better blood trail if you don't hit the spine or cranium.
No "slam" against the Barnes, but I have used, and seen results of many other hunters using the Nosler's, and know they WORK.