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XM193 - why do the cases look so bad?

Discussion in 'Caliber Corner' started by cowboy1964, Feb 22, 2011.

  1. cowboy1964


    Sep 4, 2009
    Most "M193"-type 5.56 ammo I seen online look like the below. What's the deal with the case? I assume it's just because of a shortcut made in the production process and doesn't harm function but it sure looks bad.

    Last edited: Feb 22, 2011
  2. Merkavaboy

    Merkavaboy Code-7A KUZ769

    We don't know what your ammo looks like. Any way to post some pics of it?

  3. rwrjr


    May 25, 2007
    Northern VA
    That's what the case is supposed to look like. The cases are annealed, that is heat treated. Some vendors of commercial ammo polish the cases afterward to make them nice and pretty. The polishing just adds unnecessary time and cost to production.

    Lake City and others skip the polishing step for military ammo.
    Last edited: Feb 22, 2011
  4. RyanNREMTP

    RyanNREMTP Inactive/Banned

    Jun 16, 2007
    Waco, Texas
    I think he's referring to the discoloration of the case near the neck. I have no idea why it discolors like that but I have some other ammo (5.56) that is like that as well. I don't have any issue with it.

    Besides it hides in a magazine so no one is looking.
  5. Gunnut 45/454

    Gunnut 45/454

    Jun 20, 2002
    Yep that what they are supposed to look like- Obviously you shoot alot of Commercial brass(.223)! They don't anneal there brass! Thats 5.56mm made to Mil spec's:supergrin:
  6. rwrjr


    May 25, 2007
    Northern VA
    I thought they did anneal but polished afterward. I could be wrong though.