I am trying to duplicate some factory 300 win mag loads (that are quite expensive.) I have the factory brass- the same bullet- and primer. I'm not sure on the powder though. I talked to the company and figured they would tell me what powder they were using- as their main business is selling the bullets and not the loaded ammo. Unfortunately they wouldn't- so I am trying to figure it out. In talking to them I don't think that it is a powder made special for them- as they hinted it was a commercial powder.

I pulled a few bullets and weighed the charge.... In 300 win mag with a 185gr bullet it had a charge of 81.2 grains of spherical powder. It was all powder with no filler. According to my manuals the only powders that are spherical and can safely go that high are Ramshot Magnum and Accurate Mag Pro (that can both go to about 84grains). But my manuals are a few years old now, are there any other powders that I need to look into that match the criteria?

And yes- I know to work up to the 81.2- not just start there. Thanks.