Try this link out, hopefully it'll work for ya. I initially thought, when I saw your thread, that RL16 was too fast burning for .300WinMag but Alliant has a few loads with it using 150-180gn bullets. Hope this helps.
Thank you! I have developed several loads for my kimber subalpine 300wm using reloader 16 and it is the best powder for my gun! I tried h1000,h483sc and reloader 26. Nothing is as consistent and fast as r16.
I'm shooting 175gr Federal TLR at 3050 fps getting 1/2moa.