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20 Ga AA hulls buckling. Help

Discussion in 'Shooting Related Threads' started by Shooting Jack, Jul 19, 2013.

  1. Shooting Jack

    Shooting Jack Active Member

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    I am having trouble with the AA hulls buckling or getting a ring around the hulls just above the brass. I had this problem on my Mec Grabber so set up a Hornady 366 Auto and have the same problem. I'm using 20/28 powder and 7/8th Claybuster wads. I might get five reloads with no apparent problem then the next five will either buckle or the ring around. I have tried three different powders and had the same results. Suggestions/help. Jackie B.
     
  2. David McMillen

    David McMillen Well-Known Member

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    Jack, does this happen on the 5th station or 6th? Either one, you will have to raise one or both. I am assuming you are loading Winchester HS 20's.
     
  3. Skeetbender

    Skeetbender Active Member

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    Try more wad pressure, if that does not help you may have to back off on your your crimp a little with that combo.
     
  4. Nebs

    Nebs Well-Known Member

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    Your component stack height is too tall. Look for a shorter wad. I use the orange duster wad (now made by Downrange) with no problem. I hear Windjammer has a 20 ga. wad that also is a tad shorter. I had a similar problem with the 12 ga. AAHS and switched to the Downrange DRA12 wad, which also is shorter, and the problem went away.
     
  5. hmb

    hmb Well-Known Member

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    Reduce the amount of shot. HMB
     
  6. Duck 51

    Duck 51 Member

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    Could it be that the Claybuster wads are too straight for the HS hull? I found that to be true with the new AA 12 gauge hulls. I went to Winchester wads and had no more problems after that.
     
  7. Barry C. Roach

    Barry C. Roach Well-Known Member

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    Play with the crimp starter, both up and down. If that doesn't work, try a different wad.
     
  8. Shooting Jack

    Shooting Jack Active Member

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    The problem actually starts on station 5 and will try to raise it a hair and add a little wad pressure and see if it works. Thanks a lot for your help. Jackie B.
     
  9. Jeff P

    Jeff P Well-Known Member

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    Hornady 366 crimp dies (loaders that predate the new hulls) have a .003" taper, and that will wrinkle the hull every time.

    Call hornady, tell them, they'll ship you a new crimp die and your problem will be solved.

    and they'll probably give you the die.
     
  10. fly

    fly Active Member

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    make sure all wads are the same and you aren't getting others mixed in by accident. Double check this first before making big changes. This is true for the hulls also, AA vs. HS
     
  11. Clayjcg

    Clayjcg TS Member

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    Jan 19, 2013
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    I had this same problem using the same recipe. Adjusted the wad pressure and raised the crimp die just a touch. Problem solved.