Too Much Run Out!

Discussion in 'Reloading' started by TikkaShooters, Sep 30, 2011.

  1. TikkaShooters

    TikkaShooters Official LRH Sponsor

    Messages:
    387
    Joined:
    May 19, 2010
    When I full length size my Norma 270WSM brass, my run out is 1 thousandth of an inch.

    When I neck size the brass after fire-forming, my run out jumps to 9 thousandths of an inch!

    What is going on???

    My f/l dies are RCBS and my neck die is Redding.

    Thank you in advance for sharing your wisdom!
     
  2. Broz

    Broz Well-Known Member

    Messages:
    8,637
    Joined:
    Feb 3, 2007
    Your neck die could be set too deep try backing it off 1/4 or 1/2 turn.

    Another problem could be the die is oversizing the neck too much and the expznder ball s coming up so hard it is pulling the necks off center.

    Jeff
     

  3. TikkaShooters

    TikkaShooters Official LRH Sponsor

    Messages:
    387
    Joined:
    May 19, 2010
    Thanks Jeff!

    I will definitely try your first suggestion.

    What is the solution for your second one?
     
  4. Broz

    Broz Well-Known Member

    Messages:
    8,637
    Joined:
    Feb 3, 2007
    Well, leaving the expander ball loose to float can help as it will self center. This can be done by placing a small o ring under the lock nut and only finger tighten. Also raise the ball up as far as possible. That will require a seperate decapint step. Make sure an adequate amount of lube is used and a little on the insides of te necks can help. Then make sure to clean off the lube.

    The bast way I hav found that cured it all for me was to sell all my dies and buy redding bushing dies. Not cheap but I now have very true ammo.

    Jeff
     
  5. TikkaShooters

    TikkaShooters Official LRH Sponsor

    Messages:
    387
    Joined:
    May 19, 2010
    I see bushing dies in my future!

    Thank you for sharing your experience and knowledge!