7mm resizing life

Discussion in 'Reloading' started by bkondeff, Sep 30, 2010.

  1. bkondeff

    bkondeff Well-Known Member

    Messages:
    345
    Joined:
    Feb 2, 2008
    My 7mm Mag cases have been reloaded 5 times. I noticed this time it seems like with FL resize I am barely getting them sized down to the right length. measure 4.0135-4.015 with gauge. My dies make very straight brass, .001 runout or less, which is great for basic RCBS. Other than shoulders, all else seems fine with brass(primer pockets, necks, no cracks, etc.). Does the shoulders get harder to bump back with more reloadings? or could it be my dies? PS my dies are set so tht I can't even cam over my press all the way, so there is no room left to adjust it.
     
  2. flashhole

    flashhole Well-Known Member

    Messages:
    413
    Joined:
    Nov 15, 2009
    Your brass is becoming work hardened. Anneal the neck and shoulder to soften it and you will get a few more loads from it.
     

  3. Derek M.

    Derek M. Well-Known Member

    Messages:
    2,417
    Joined:
    Jul 12, 2004
    +1.

    I anneal after every firing. It's quick and it works. Well, change that...I did anneal after every firing prior to getting the necks of my sizer dies honed. Now there is so much less brass work hardening, I've changed to about every 3 firings.
     
  4. bkondeff

    bkondeff Well-Known Member

    Messages:
    345
    Joined:
    Feb 2, 2008
    Thanks guys. I found a great old post here with pics and everything on the Annealing process. I will try before my next round of reloads. I have now been a rookie reloader for about 4 years, every time I think I know enough to be dangerous I look back at the last year and realize how much I have learned.
     
  5. 7 loader

    7 loader Well-Known Member

    Messages:
    256
    Joined:
    Oct 9, 2009
    The thing about reloading is you will allways learn new things. If you stoped, it might not be as fun.