redding competition dies, "bushings".

Discussion in 'Reloading' started by longshotjimmy, Jul 30, 2008.

  1. longshotjimmy

    longshotjimmy Member

    Messages:
    15
    Joined:
    Mar 5, 2008
    I'm looking to get the redding competion 3 die set in 7mm RUM, can anyone tell me what bushings I need to get for this, they say to measure the outside of a loaded round and subtract .002 or something, I dont have any loaded rounds tho so how do I figure that one? also they have nitrade and steel bushings, what is the advantage/disadvantage of these?
    Are these fancy dies worth the money?
     
  2. MagMan

    MagMan Well-Known Member

    Messages:
    1,008
    Joined:
    Dec 20, 2002
    You don't have to lube case necks when sizing with the nitrate bushings.
     

  3. Petersen

    Petersen Well-Known Member

    Messages:
    190
    Joined:
    Apr 30, 2007
    You do need to have one loaded first to be exact. Unless someone has any tricks they would like to share.
     
  4. Winchester 69

    Winchester 69 Well-Known Member

    Messages:
    430
    Joined:
    Mar 29, 2007
    1. Get the average thickness of the brass in the neck (~0.015"?).
    2. Double it.
    3. Add the bullet diameter.
    4. Subtract the neck tension (0.002" to 0.005").

    The final number is the bushing size.

    The TiN bushings don't wear and make the sizing operation easier. Lube is still recommended, but is not absolutely necessary.

    The bushing dies are a simple way to minimize the extent to which the necks are worked while providing a means to control neck tension. They also eliminate the negative effects of the expander ball, if you remove the expander ball from the bushing die (recommended). If your brass must be sized more than 0.005" in a single operation, which will contribute to neck run-out, you have the option to size in two steps.
    .
     
    Last edited: Jul 30, 2008
  5. longshotjimmy

    longshotjimmy Member

    Messages:
    15
    Joined:
    Mar 5, 2008
    sounds fidly, do they sell the bushings as a complete set with all the sizes, or should I get 3 or so, can anyone tell me what size I should get or will redding be able to tell me?
     
  6. LRHWAL

    LRHWAL Well-Known Member

    Messages:
    422
    Joined:
    Jan 11, 2006
    Agreed, but in fact you may have to size in 2 or more steps. I'm not sure if other dies can size more without causing the runout. I've mailed Redding's Techline and will post once I have a reply and their suggestions and I also intend to try a few other ideas that I have.

    I'm getting very high runouts with bushing dies, but am sizing 10 thou (0.010") as my Winnie brass is very thin for my factory spec chamber. I tried sizing down in 2 steps 0.340 fired case outside dimension, sized with a 0.334 and then a 0.330 and still had runout unacceptably high.

    I'm not knocking the dies to be clear, just sharing my experience.
     
  7. Williamb

    Williamb Member

    Messages:
    19
    Joined:
    Jul 7, 2008
    Best way to get your answer is to call Redding and ask for tech support. Excellent people to talk to. Jay usually answers the phone - very knowledgeable. They are all very patient and will walk you through the whole process.

    I have had excellent results with the die.

    Good luck -
     
  8. Winchester 69

    Winchester 69 Well-Known Member

    Messages:
    430
    Joined:
    Mar 29, 2007
    You're in the market for the Lee collet sizer. I don't typically recommend Lee products, but you seem to be that exception that makes the rule.
    .
     
  9. longshotjimmy

    longshotjimmy Member

    Messages:
    15
    Joined:
    Mar 5, 2008
    lee don't make neck dies for 7rum, are the redding type S dies a better option if I don't plan on turing the necks?
     
    Last edited: Aug 2, 2008