Just for the heck of it, try some IMR-4350 if you have any with the 180's (try 180 Nosler BT's if you have em). Start with 70 grs up to 72 grs. I have always found IMR-4350 to be very accurate in 300 WM's. Right now I'm using 76 grs of H481sc in my 300 WM with Nosler 180 Combined Technology bullets and it is very accurate with that powder as well. Get's 3100 fps as well.