Gearyr--The Nosler reloading manual is the best source of data on loads using Nosler bullets. Do you not have it? The .300 WinMag has been around for a while and every manual I've ever seen has a section on that cartridge.
Suggestion: The data you get off the I'net are worth exactly what you paid for them. If you want to load Nosler bullets get the Nosler manual. Having more than 1 manual is a good thing anyhow, as you can compare between the 2-or more-manuals and sometimes get a better idea of a good recipe than you can from only 1 manual.
I apologize in advance if I'm taking your post wrong--This is not a flame, it is a suggestion. But you need authoritative hard copy to use for recipes for loads.
God Bless America