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Resizing/Crimp problem- Help

Discussion in 'Reloading' started by Hal A Looyah, Dec 20, 2011.

  1. Hal A Looyah

    Hal A Looyah

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    I am at a loss on diagnosing my problem.
    I have loaded thousands of cast cowboy and other pistol loads on a Dillon 550 for years. Never jacketed or plated.

    I recently loaded some plated Berry's 9mm bullets into mixed brass. Some of the bullets could be pulled or twisted by hand. Increasing the crimp until the bullet held,yielded obviously over crimped rounds like the ones in the recent thread. I am using Dillon Dynamic dies. I called Dillon. He said that I had a resizing issue. He said that a seated bullet should hold, even before being crimped. This is not limited to a certain brand of brass and happens in 10 to 20 percent of loads. I can't find a measurement problem with any of the bullets or brass. What am I overlooking. For the record, some of the brass is Glock fired.

    First post here. Thanks fellas.
     
  2. CCV

    CCV Millennium Member

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    Check your bullet diameters with a good, accurate micrometer. I have seen undersized plated bullets.

    Of the rounds you're having "loose bullet" issues with, are they all the same headstamp? I had some issues years ago with WW 9mm cases. Discarded all my brass with those headstamps and the problem went away.

    Is a name brand JACKETED bullet tight in those same cases?

    Try resizing one of the suspect cases in a different 9mm die (maybe a friend's).

    Start eliminating one variable at a time.
     

  3. CCV

    CCV Millennium Member

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    For the record, I have not had good experience with plated bullets. The exception is Speer bullets.
     
  4. Hal A Looyah

    Hal A Looyah

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    I just tried some XTP bullets. XTP's and Berry's would slip in and out of a case resized on my dillon dies. I then ran the brass through a lyman die on a single stage press and it resized ALOT. Brass then loaded fine on the Dillon. It does seem to be a loose brass/ not enough resize issue. Headstamps range from FC, Win, Blazer Brass and others. Is this the type issue that requires a EGW undersize die or what?
     
  5. F106 Fan

    F106 Fan

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  6. Hal A Looyah

    Hal A Looyah

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    Upon further investigation, the Lyman die measures .005 smaller than the Dillon die.
     
  7. fredj338

    fredj338

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    Certainly check the bullets. I have seen plated run 0.354" in some 9mm brands. Some brass won't hold a bullet only 0.0005" smaller. It's never about the crimp but the neck tension. Measure the powder thru expander, just in case a bad one got by Dillon. It shouldn't be larger than 0.354".
     
    Last edited: Dec 21, 2011
  8. CCV

    CCV Millennium Member

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    Good advice.....................