Haven't worked too much with the 165's in the 300WSM, other than for my buddies M70 EW 300WSM. I used H100V and tried IMR4350 as well. H100V shot about the best at 3130 or so. I run alot of RL19 for the 180 AB's though, it is really accurate in my rifle and runs right at 3030 in my rifle. When I visited the Nosler factory, their head ballistician saif RL19 was THE powder for the 300WSM.
