Have you gone to Nosler's web site? They have a "ballistics room" there with free handloading data for their bullets.
Nosler: bullets, ammunition, rifles, brass, and reloading data.
I copied that link right from their .300 WSM/180 gr loads, but if it doesn't work, just go to Nosler.com and poke around a bit, you'll find it under "information" then "ballistics room."
A local .300 WSM enthusiast here uses Ramshot Hunter powder with excellent results too. I've loaded some test rounds with it, but haven't had an opportunity to get to the range with them yet.