300 Win Mag case neck thickness

Discussion in 'Reloading' started by MOOSE39465, Sep 8, 2013.

  1. MOOSE39465

    MOOSE39465 Well-Known Member

    Nov 11, 2010
    What is the minimal case neck thickness on 300 Win Mag brass? I have never turned the necks on any brass, but most of my brass has very inconsistent neck thickness. Some of the brass has as little as .009 thickness, but measuring the far side of the neck I have as much as .016. When shooting at the range i'm starting to get more flyers then I would like to.
  2. MagnumManiac

    MagnumManiac Well-Known Member

    Feb 25, 2008
    My brass averages .012", I don't neck turn, my chamber isn't tight enough to bother.
    I actually find my brass is pretty consistent across Rem and Nosler brass. I must admit I don't check it often other than when I'm working out what size bushing to use when it's new.

    I realise this may cause inconsistent neck tension, but I doubt it would effect groups by throwing in a flier, it may be a rifle issue, such as a walking barrel due to inconsistent heat treating, this is common in factory barrels.