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Thread: separated case

  1. #1
    Boolit Master
    white eagle's Avatar
    Join Date
    Jul 2010
    718 miles E. of Wall Drug

    separated case

    I had a case separate in one of my guns
    it marred the chamber where it separated
    Do I need to worry about the chamber now?
    Can the marring be removed?
    Is it ruined or can I carry on?
    Hit em'hard
    hit em'often

  2. #2
    Boolit Master

    Walks's Avatar
    Join Date
    Jun 2016
    But don't shoot any ammo from the batch that the separated case came from.

    Case head separation is no joke. Every round should be broken down. Every case inspected for stretching. If they're mixed headstamps......
    I HATE auto-correct

    Happiness is a Warm GUN & more ammo to shoot in it.

    My Experience and My Opinion, are just that, Mine.

  3. #3
    Boolit Master
    swheeler's Avatar
    Join Date
    Mar 2005
    All you can do now is try it and see, follows Walks advice about using what you got. Always remember a marred chamber is better than a face full of hot brass or eye surgery. Time to start looking at your sizing operation, quit pushing that shoulder back or in then case of a straight walled cartridge stop trimming so short.
    Hell, I was there!

  4. #4
    Boolit Grand Master

    Join Date
    Mar 2013
    Northwest Ohio
    When a case separates its not the brass that scars the chamber but the high pressure gasses and heat that do it. Its just like blown primers pitting a bolt face. Removal of the forward portion can damage a chamber it not done carefully but its normally the high pressure gasses being released.

  5. #5
    Boolit Grand Master Texas by God's Avatar
    Join Date
    Mar 2016
    Similar to flame cutting a revolver topstrap? I've only had two or four head separations in my time and LUCKILY the chambers weren't hurt. I've had a couple of bolt faces with gas slices, though.

    Sent from my SAMSUNG-SM-G930A using Tapatalk
    Last edited by Texas by God; 08-28-2019 at 10:19 PM.

  6. #6
    Boolit Master

    Join Date
    Apr 2014
    Way up in the Cascades
    Hard to say without examining it. The marring might be removed with a good chamber cleaning. If not, it may/may not be severe enough to effect new brass. Can't really ream or polish it out without risking an oversized chamber that will then be junk. Must have been a pretty hot load (?) or much used brass.

  7. #7
    Boolit Master
    Join Date
    Jul 2014
    If I come across a chamber that had a case separate in it, I always do a Chamber Casting to get a good picture of the condition of the chamber, and be able to measure it for scaring or Bulging.
    Bulged Chambers from a case separation are Rare but I have seen them before.
    You can do a chamber casting yourself with Cerosafe from Brownell's or maybe Roto Metals.
    It aint that hard, and there are lots of info on the Net.
    Clean the chamber really good before casting.
    You are looking for Scaring, not Debris or staining.
    Cerosafe can also be used to remove a separated case that is stuck in the chamber.
    That Is one of the reasons I always have some on hand.

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Abbreviations used in Reloading

BP Bronze Point IMR Improved Military Rifle PTD Pointed
BR Bench Rest M Magnum RN Round Nose
BT Boat Tail PL Power-Lokt SP Soft Point
C Compressed Charge PR Primer SPCL Soft Point "Core-Lokt"
HP Hollow Point PSPCL Pointed Soft Point "Core Lokt" C.O.L. Cartridge Overall Length
PSP Pointed Soft Point Spz Spitzer Point SBT Spitzer Boat Tail
LRN Lead Round Nose LWC Lead Wad Cutter LSWC Lead Semi Wad Cutter
GC Gas Check