Don't know if this will help but when I used to load for the standard 300 Win Mag cartridge using 200 grain bullets the best Powder I found was Retumbo with Winchester magnum primers.
Thanks Flashole, trying to hold onto my Retumbo, have H1000, 7828ssc, h4831, rl17, rl33, h4350. I'll see what an Internet search pulls up. I know that there is a lot of knowledge on this site, was hoping to tap into it
Tater, had decent accuracy with H4831SC and the 200 Accubond, but the 185 Berger was outstanding with H4350 in my pal's Savage stainless 300WSM. Go figure.