300 Win Mag- Sierra Info

[tlarson]

I am looking for the powder that Sierra lists in their Accuracy load for the 190gr HPBT MatchKing? The three manuals I have do not list the specific bullet and all recommend different powders as the most accurate.
I am hoping Sierra will list one of the same powders so I can make a educated decision and limit the different types of powder I need to purchase to work up a good load.

Thanks in advance for any help you can give