The best load I've found for my Sako 75 in 300WM is 62gr of IMR 4320 behind a 150gr Nosler Partition. It's a not a super hot load or heavy bullet but it's accurate (1/2" @ 100). At 3120fps it does everything I need it to do. I haven't done much other experimenting w/ this rifle since I found this load but I'm looking forward to testing out some heavier bullets w/ it; 165, 180, maybe 200-220.