Re: Powder Suggestions - rookie question
Generally the 223 will require a faster powder & the 300 win mag slower. My favorite 223 powders are Ramshot TAC & H 4895. I use H4350 in my 300WSM, it should also be fine in the 300 win mag. I think 4831 is another good 300 win mag powder, though I have never used it. I would get some primers & a few other things as you find them, they'll last a long time stored properly. Yes benchmark has a good following, especially with lighter 223 bullets.