Seabeeken
Well-Known Member
I think hammer recommends magnums because of faster more positive ignition. The bullets have less bore friction and move more easily than standard and need a faster powder and ignition to ensure proper burn. IME i see no difference with single base powders and recently started using ball powders in my testing. But dont notice any difference so far. YMMVWell then , I have 1000 plus large rifle primers . I talked to hammer and they recommended the magnums but that might have been, because of the powders I have on hand, they recommended Varget