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Thread: Decapping military 5.56 and 7.72 Brass. Consumptive?

  1. #21
    Graduate Airgator0470's Avatar
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    Quote Originally Posted by seadog View Post
    That's exactly what I'm saying . If you give me a moment I'll see if rumbler can post it
    At one time I had a drawing that indicated a .002 (or something really small) only in the neck length IIRC. Can't find it...
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  2. #22
    Graduate seadog's Avatar
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    I'll bite.
    Base diameter 223. 0.3760 . 5.56 0.3780
    Shoulder diameter. 223..3553 . 5.56 0.3560
    Neck-2/Case Mouth. .223 0.2540 5.56 0.2550
    Freebore diameter. 223 0.2245 5.56 0.2270
    Base-to-case mouth. .223 1.7720 5.56 1.7750
    Base to shoulder. .223 1.2340. 5.56. 1.2380
    Neck length. .223 0.2200. 5.56. 0.2180
    Freebore length. .223. 0.0250. 5.56. 0.0500

    The throat angle is also off by 0.6 degrees
    "Only the dead have seen the end of war" -Plato

  3. #23
    Graduate seadog's Avatar
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    I'll bite.
    Base diameter 223. 0.3760 . 5.56 0.3780
    Shoulder diameter. 223..3553 . 5.56 0.3560
    Neck-2/Case Mouth. .223 0.2540 5.56 0.2550
    Freebore diameter. 223 0.2245 5.56 0.2270
    Base-to-case mouth. .223 1.7720 5.56 1.7750
    Base to shoulder. .223 1.2340. 5.56. 1.2380
    Neck length. .223 0.2200. 5.56. 0.2180
    Freebore length. .223. 0.0250. 5.56. 0.0500

    The throat angle is also off by 0.6 degrees
    "Only the dead have seen the end of war" -Plato

  4. #24
    Administrator Rumbler's Avatar
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    Here you go. I think whoever snapped that first photo may have a nervous disorder as bad as mine.

    IMG_20140204_183513.jpg

    IMG_20140204_185739.jpg
    I'd rather be lucky than good, but I'd rather KNOW I'm good than HOPE to get lucky.

  5. #25
    Graduate Airgator0470's Avatar
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    Quote Originally Posted by seadog View Post
    I'll bite.
    Base diameter 223. 0.3760 . 5.56 0.3780
    Shoulder diameter. 223..3553 . 5.56 0.3560
    Neck-2/Case Mouth. .223 0.2540 5.56 0.2550
    Freebore diameter. 223 0.2245 5.56 0.2270
    Base-to-case mouth. .223 1.7720 5.56 1.7750
    Base to shoulder. .223 1.2340. 5.56. 1.2380
    Neck length. .223 0.2200. 5.56. 0.2180
    Freebore length. .223. 0.0250. 5.56. 0.0500

    The throat angle is also off by 0.6 degrees
    Uhh.... excuse me Sir... those are CHAMBER specs, I posted those and gave them to Rumbler some time back.

    BRASS... the question was whether or not there was a difference in BRASS not the CHAMBER...lol.

    Other than minimal case wall thickness... .223 Rem cases and 5.56 NATO cases are identical, only the CHAMBERS and load pressures are different.

    You had me thinking I was about to learn something...
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  6. #26
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    Quote Originally Posted by Rumbler View Post
    Here you go. I think whoever snapped that first photo may have a nervous disorder as bad as mine.

    IMG_20140204_183513.jpg

    IMG_20140204_185739.jpg
    I guess he did not read post #19... I clearly asked if he thought there was a difference in the brass measurements... I knew for a fact there was not... but I figured maybe he had something.

    This is what I posted some time back... remember?
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  7. #27
    Graduate seadog's Avatar
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    I had my head wrapped around chambers. Apologies for the confusion.
    "Only the dead have seen the end of war" -Plato

  8. #28
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    Quote Originally Posted by seadog View Post
    I had my head wrapped around chambers. Apologies for the confusion.
    LOL... you had my attention that's for sure.
    Signal-0 Productions Firearms Training... for the working man.

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