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Thread: Something new, what causes this?

  1. #1
    Boolit Buddy lcclower's Avatar
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    Something new, what causes this?

    I have some once-fired 30-30 cases with flattened sections on the rims.
    This is new to me and I wonder if anyone here has seen the same, and what causes this flattening?
    Image at https://drive.google.com/file/d/1zzo...ew?usp=sharing
    Everybody grab a shovel, we got a swamp to drain.

  2. #2
    Boolit Master
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    From you rifle ??
    or range pickups ?

    i could be wrong but i believe it is from a fixed ejector
    (ejector is in the side of the receiver ...not a spring type ejector that is in the bolt)

    Done when bolt moves back and brass hits the ejectore before leaving the rifle

  3. #3
    Boolit Master TurnipEaterDown's Avatar
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    It looks to me like the rim is bent, or at best has a compressed section.
    I would confirm this through measurement across the rim bridging that section, and a measurement avoiding that section. It should measure as if it were thicker cutting across that section vs. not, if the rim is bent. If part of the rim is compressed in a section, you should be able to see a gap there against your measuring tool, where the tool should obviously be coincident with the rim surface otherwise.
    It seems that the support structure for the case head in whatever chamber that they were fired in isn't a one piece bolt head, something was modified, or there was some misuse/pressure abuse.
    Individual thoughts are what you make of them, and there is but one picture w/ no physical examination possible, but I think I would measure up some selection of those cases pretty carefully before deciding on using them. Rim dimensions (OD, thickness), case head dia for expansion, COL for stretch, primer pocket for expansion, etc.

  4. #4
    Boolit Grand Master
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    Looks similar to over pressure to me.

  5. #5
    Boolit Master trails4u's Avatar
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    I have seen 30-06 GI brass like that......but have no idea as to cause.
    "Do not follow where the path might lead, go instead where there is no path and leave a trail" Ralph Waldo Emerson

  6. #6
    Boolit Master
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    I would check the surface of the bolt.
    Hick: Iron sights!

  7. #7
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    Winger Ed.'s Avatar
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    Quote Originally Posted by Ford SD View Post
    i could be wrong but i believe it is from a fixed ejector
    That was my guess. Something like a Springfield 03-A3 type ejector.
    In school: We learn lessons, and are given tests.
    In life: We are given tests, and learn lessons.


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  8. #8
    Boolit Master


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    Lack of lube teamed up with a steel hammer in a Lee Loader.
    I know I’ve seen some Lee Loaders that look like someone used a jackhammer on them

  9. #9
    Boolit Master WRideout's Avatar
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    One possibility for a bright spot in one place on the rim is high pressure causing the brass to flow into the extractor cut on the bolt face (ask me how I know.)

    Wayne
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  10. #10
    Boolit Bub
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    I'll second the Lee whack it loader in the hands of someone who needs some instruction.

  11. #11
    Boolit Master
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    I’ll third the Lee loader brass.

  12. #12
    Boolit Grand Master uscra112's Avatar
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    My firewall won't let that Guuugle file load.
    Cognitive Dissident

  13. #13
    Boolit Buddy
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    Maybe a dirty/rusty ejector/extractor on a single shot rifle. With an overly energetic closing of the action?

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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