Re: Any good load suggestions for 300WM and 190MK?
66 grains of IMR 4350 with a WLR is a known accurate load with the 190, since 1966 or so. Different powder lots require starting at 65 grains and working up. In my tight chambered and short throated rifle, 2900/2950. Works for me.
71 grains of RL22 with a 210M works relatively well.
72 grains of N165 and a BR-2 works relatively well also.
Start below and work up though.