I have a 300 WSM that will shot .5 groups at 100 yards with factory Federal premium with 165 batnes tsx. It would probley shot better if I could. I have tried three different powers imr 4064, imr 4350, and reloader 15, with a 165 barnes tsx, and CCI magium rifle primer. I cant not get any thing to shot under a 2 inches. I really want to handload for this rifle, but I can't get any better loads or even close to factory loads. Any of you WSm guys there have any advice? I have never had this hard of a time with a rifle.