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Favorite powder for 9mm Subs

Discussion in 'Reloading' started by Younggun, Jan 7, 2018.

  1. Mastiff

    Mastiff New Member

    Oct 19, 2015
    Unique for many years has worked well

  2. Kosh75287

    Kosh75287 Active Member

    Jul 6, 2008
    I find it heartening to learn that Unique works well in SMGs, but I would have thought the preference would have been for one of the newer ball powders (I'M thinking of AA#5, here, but I could see WW231 working, also).
    I guess, with a blow-back SMG, it's difficult to see much velocity increase with slower-burning powders, but I've always wondered if the difference was more than what could be expected from random factors. In a roller-delayed SMG, perhaps the difference would be more pronounced. If such an SMG is built that would accommodate a 10mm or 9x25 Dillon, the shorter range limitation associated with weapons of this class might need to be rethought.

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