Shims for dies to aid in headspace

Discussion in 'Reloading' started by Sully2, Oct 14, 2013.

  1. Sully2

    Sully2 Well-Known Member

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    Ive seen various posts ( cant put my finger on any at present though) that says to add a shim under ( ?? forget which part??) to aid in minute adjustment.
    Can someone enlighten me on this deal? Im definitely confused on it. Thanks
     
  2. BountyHunter

    BountyHunter Writers Guild

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    They are called skip Otto shim kits go to Sinclair International reloading to orderly
     
  3. Mikecr

    Mikecr Well-Known Member

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  4. flashhole

    flashhole Well-Known Member

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    What problem are you trying to solve?

    If you are FL sizing and the die is adjusted all the way down and you still don't have enough shoulder bump you can add a shim between the base of the case and the shell holder. I use metal foil.
     
  5. Sully2

    Sully2 Well-Known Member

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    Thats EXACTLY what I needed. Thanks guys!!
     
  6. Sully2

    Sully2 Well-Known Member

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    "you can add a shim between the base of the case and the shell holder."..??

    You mean stuffed in the shell holder "slot" to raise the casing?
     
  7. flashhole

    flashhole Well-Known Member

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    yes, feeler gauges work really well
     
  8. Gene

    Gene Well-Known Member

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    I would never do that. Use the Skip Otto shims to convert F/L setting to neck only sizing with no die change. The Redding Competition shell holders will allow you to size down a little more on the brass.
     
  9. Sully2

    Sully2 Well-Known Member

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    And a new set for every caliber I load for! No thanks....the name here is NOT J. Paul Getty
    and Im not interested in NECK sizing...Im interested in setting back the shoulder
     
  10. boomtube

    boomtube Well-Known Member

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    "The Redding Competition shell holders will allow you to size down a little more on the brass."

    Not so. The Redding "Comp" shell holders are made thicker to reduce and control the possile amount of shoulder set back.

    No one needs a set for "every" cartridge he loads for, only need one set for each case head size. Even then, if they help at all they're only useful for those cases we may want to squeeze out the last few thou of possible accuracy, they sure won't make a massive accuracy difference.

    Any case body contact with a FL die during use changes the case body and is NOT "neck" sizing. Some case/FL die configurations will permit neck sizing by backing the die up a bit but it's not common, especially if the loader wishes to size the full length of the necks; that's why neck dies are made. If all it took was backing FL dies out a few thou no one would buy neck dies. Not that neck sizing has any real value in factory sporting rifles anyway.
     
  11. Trickymissfit

    Trickymissfit Well-Known Member

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    you can buy a shim kit from most of the better machine tool outlets. Look for the mill arbor shim kit. Come with everything from .001" to .06", and are not expensive, and are very accurate.
    gary
     
  12. boomtube

    boomtube Well-Known Member

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    True. I bought a cheep auto ignition "feeler" gage and use the blades in it.
     
  13. Sully2

    Sully2 Well-Known Member

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    The shims Ive ordered will do what I need just fine
     
  14. flashhole

    flashhole Well-Known Member

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    That's what I use too. Getting the shim between the case bottom and shell holder works just fine and gives excellent repeatability.