380 cases split

Discussion in 'Handloading and Reloading' started by Sefuller5741, Apr 25, 2021.

  1. Sefuller5741

    Sefuller5741 Member

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    I have been reloading a lot of 380 since I never see any available. I few times (out of close to a thousand rounds) I have noticed a case that is split at the mouth. I am just barely belling the mouth and not really crimping at all. Is this just inherent in this caliber? I don't recall ever noticing it in my 45 or 9mm loads.
    20210425_083727.jpg 20210425_083738.jpg 20210425_083747.jpg
     
  2. Ironicaintit

    Ironicaintit Member

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    I’ve seen it happen on any pistol brass that has a lot of mileage
     
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  3. rfwobbly

    rfwobbly Member

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    Classic work hardening of the material. Probably has more to do with the brand of brass you started with, and its alloy. Follow that with the brand of dies you use, which determines how much cold working takes place. Then, whether you lube your brass.
     
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  4. reloaded_in_pa
    • Contributing Member

    reloaded_in_pa Contributing Member

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    Not all brass is created equal. Some brands are more thin at the mouth than others. I find this more on 380 brass.
     
  5. AK Hunter

    AK Hunter Member

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    What he^^^^ said.
    Good eye.
    It happens, but good reloaders catch it before it causes any problems.
     
  6. FROGO207

    FROGO207 Member

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    I haven't noticed any more split necks on my 380 than on my 9MM but I load it and shoot it much less as well. 380 is probably my least loaded of my auto pistol ammo. I find many more of my 38 SPL brass with splits but they have been reloaded more than 100 times at least.
     
  7. NMexJim

    NMexJim Member

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    In my experience, .380 cases are more fragile than 9mm (at least they buckle more easily). Higher velocity (which isn't very fast in a .380) equals higher pressure, and it doesn't take a lot to get there quickly.

    I use Win cases almost exclusively, and I've not had any splits, but I'm like most and don't shoot .380 as much as other calibers.

    What pistol, what bullet, and what powder?
     
  8. CZ9shooter

    CZ9shooter Member

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    I load a fair bit of 380. Never seen a split. I have seen a few in 9mm though. No real rhyme or reason to it. I figure either the case had been fired many times, or simply a bad batch of brass.

    Most of my brass is range pick-ups, so I have no idea of its history.
     
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  9. mdi

    mdi Member

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    Another thought; unless your gun is newly manufactured, many European and "surplus" 380 ACP (9x17, 9mm Browning, 9mm Corto, 9mm Browning Court, etc.) have "generous" chambers which also add to the work hardening of the cases. Extra "work" sizing brass shot in larger chambers. But I've only been reloading 380 Auto for a SCCY for about 5 years and haven't found any splits, yet...
     
  10. NMexJim

    NMexJim Member

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    Uh oh - rfwobbly won’t be happy hearing slander about European craftsmanship!
     
  11. Rule3

    Rule3 Member

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    "It" happens on 380 brass, They are pretty thin. They crush easy if off center in the sizing die as well!
     
  12. Walkalong

    Walkalong Moderator Staff Member

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    It happens, sometimes on new(ish) cases. Unless you have a lot in a batch doing it, don't worry about it.
     
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