Ammo Cross refference

Discussion in 'The Ammo & Reloading Forum' started by bizy, May 31, 2009.

  1. bizy

    bizy New Member

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    7.62 X 51 is the same as a .308 round.
    Is there any other ammo that is the same but labeled different?

    Sorry about all the one sentence questions. Seems like every post I read, I find things I don't know...
    Thank for your patience..
  2. Lotsdragon

    Lotsdragon New Member

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    .223=5.56 comes to mind off hand.................
  3. BobMcG

    BobMcG Well-Known Member Supporting Member

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    The same? Practically, yes, technically no with operating pressures being different. One example being 7.62x51mm NATO brass tends to be thicker than .308 Win. brass reducing interior space. Do a search, it's a topic that gets covered then and again.

    The same can be applied to the 5.56x45mm NATO vs. .223 Rem.

    Others that go by more than one would include:

    .30 Army / .30-40 Krag / Caliber .30 (1892)
    .30-06 Springfield / .30 Gov. / 7.62x63mm Caliber .30 M06
    7mm Mauser / 7x57mm
    8mm Mauser / 7.92mm Mauser / 8x57mm
    280 Rem. / 7mm Express Rem.
    250 Savage / 250-3000

    The list can go on and on and on....
  4. Alpo

    Alpo Well-Known Member

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  5. bizy

    bizy New Member

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    Ya, I probably did.. Sorry. My mind works some time. Some time it doesn't. I ask my wife things sometimes only 15 minutes apart..
  6. knothead

    knothead New Member

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    this is not true. 223 and 5.56 are technically not interchangeable. It is NOT recommended that you shoot 5.56 nato spec ammo in a 223 chambered firearm. the nra magazine had a good article on the differences a while back. I read about this several years ago and have rarely seen this info printed in the mainstream magazines. I have also seen the same statements made about the 308 & 7.62 but not in a reputable source like american rifleman. My armalite is chambered 5.56 and is marked as such. if you have ever seen a reference to the 223 wylde chamber it is sort of mix between 223 and 5.56. 223 in 5.56-good 5.56 in 223 - bad
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