I’ve used mostly 180 Partitions in my 300WM and 300WSM. No complaints, though I do plan to try the 200 Partitions at some point in the Win Mag. My brother has actually used the 150 GMX out of his 300 WM with excellent results. He went with that as it shot so well in his rifle, but to my knowledge he’s yet to catch one in anything he’s shot. Can’t argue with the results.