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Is this case head separation?

Discussion in 'Handloading and Reloading' started by Axis II, Dec 19, 2019.

  1. Axis II

    Axis II Member

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    I was pushing these pretty hard with 52gr of IMR 4198. Only a few have the ring. These are 3 separate pieces.
     

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  2. Walkalong

    Walkalong Moderator Staff Member

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  3. sparkyv

    sparkyv Member

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    Can't really see well, ohihunter2014. Pics of cartridges are blurry, but the load data is focused well. o_O
     
  4. mrawesome22-250

    mrawesome22-250 Member

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    Are you still doing the one full turn crimp?

    Could be cases starting to buckle if you are.
     
  5. Axis II

    Axis II Member

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  6. Axis II

    Axis II Member

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    Nope I’m doing 3 turns this time :D:rofl:

    I actually noticed the last one before crimping. 1/8 turn for crimp.
     
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  7. Axis II

    Axis II Member

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    Sorry the lights are terrible. I have a ceiling light that’s about 8ft behind me and an old adjustable desk light mounted on top of the bench and LED on the press.
     
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  8. mrawesome22-250

    mrawesome22-250 Member

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    From your first blurry photo it looks like the ring is well above the case web (which would indicate an incipient seperation).

    If you put a magnifier on it can you see any cracking?
     
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  9. frankmako

    frankmako Member

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    i got some starline 357 mag brass that breaks in the same place. i will lose one or two about every other match. not hot loads, just the way it goes. case head seperation is closer to the end.
     
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  10. Walkalong

    Walkalong Moderator Staff Member

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    Pull the worst looking one and check the inside. If you are indeed getting case head separations with a straight walled caliber that headspaces on the rim you are really pushing pressure, or your action is flexing a lot, or both.
     
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  11. buck460XVR

    buck460XVR Member

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    Levers, because of the way the bolt locks up at the rear do tend to flex and can cause case head separation in straight wall cases when loads are high and brass used too many times for high pressure loads. But I agree with Walkalong, the only way to know is to do the paper clip test. BTW......Really hard to get a separated case from a lever chamber.
     
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  12. Axis II

    Axis II Member

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    These have been loaded about 6 times for a Marlin 1895. In the beginning of their life it was high end trap door and low end Marlin data until the last 2-3 loading's of mid range Hodgdon data. I will pull the worst looking one tonight and see if there is a divot.
     
  13. BigBore45

    BigBore45 Member

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    reach in with a paper clip. see if you feel an edge inside case. this has been covered 100+ times
     
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