7mm Rem Mag bullets pushing deep into the case with recoil

Discussion in 'Reloading' started by KDL, Feb 26, 2006.

  1. KDL

    KDL New Member

    Feb 26, 2006
    I have a problem with reloads being pushed into the case during recoil. This only happens with brass that has been previously fired. If I use new brass, no problem. I am resizing every case every time. I'm shooting 160gr Nosler Accubonds in Winchester brass with 63grs of RL22.
    I'm using RCBS dies.
    Any suggestions?
  2. green 788

    green 788 Well-Known Member

    Feb 5, 2005
    If you're leaving lube inside the case necks, that's a no-no...

    Other than that, remove the expander ball mandrel and chuck it in a drill and spin it, using 400 grit sandpaper to polish about .002" off it's diameter. Finish up with 600 grit, then Flitz and it'll be shiny and smooth...


  3. Coyboy

    Coyboy Well-Known Member

    Jan 30, 2005
    KDL, after sizing, measure your outside neck dia. After seating a bullet, measure it again. The Dia. should have increased by .001-.002" This is the amount of grip the brass has on the bullet. If it's under .oo1, you can do what Dan said about polishing the expander ball. Your brass may have thin neck walls measure them also should be around .015". If they are thin the size die will not work with that brass because the outside dia. would have to be smaller to get the inside dia. small enough to grip the bullet.
  4. WoodsWalker

    WoodsWalker Active Member

    Nov 25, 2004
    I had the same problem with my 7STW. When I switched to Redding Bushing Style dies the problem was over. Just experiment with a few different size bushing and everything will be find. /ubbthreads/images/graemlins/wink.gif