My new rifle arrives in 2 weeks time. It'll be my first 300WM. I'm trying to work out which powder and primers to get for it. Having had good experience with N140 in my 308, brand loyalty leads me to consider N160 or N165. Anyone have a view? In the same vein; I have read of individuals experiencing quite large velocity SDs when using magnum primers. Anyone recommend Fed 210 (rather than 215) in the 300 WM?