Lyman's 48th and 49th both list 300 H&H as using WLR primers, so I was talking to the gentleman at the gun store, and my "oh by the way..." question was, what primers should I be using, he said "magnum of course". I told him everywhere I've seen used standard primers. So sure enough he whips out a Sierra manual that lists it as using WLRM's.
Anyone ever loaded this cartridge? If so, what did you use? Powder I'll be using is IMR-4831. 180 gr boat tail.
Anyone ever loaded this cartridge? If so, what did you use? Powder I'll be using is IMR-4831. 180 gr boat tail.