Which Ammo? Chambered in .223/5.56 x 45 mm NATO

Discussion in 'Rifle Discussion' started by Russ1590, Feb 1, 2013.

  1. Russ1590

    Russ1590
    Clark Co
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    First things first... This is a pathetic question and only one a complete idiot or noob would ask... I'm one of the two, potentially both...

    Now that that is out of the way...

    The barrel in the rifle is a stainless steel match grade with a 1:8 twist.

    So maybe the way to ask this question and look like less of an idiot would be to say...

     
  2. Trailboss

    Trailboss
    Vancouver, WA
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    Your barrel should shoot anything 55 grains or heavier quite well.
     
  3. Grunwald

    Grunwald
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    .223 and 5.56 are NOT the same.
    Check the lower receiver for the exact chamber.
    If it is 5.56 then you're OK to shoot both.
    However if it is marked as .223 do not shoot 5.56 out of it.

    55 grain is your normal cheaper option and fine for practice.
     
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  4. akmewon

    akmewon
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    Arent you backwards on that ....as long as barrel or upper is chambered for 5.56 both are fine but if it says .223 then only .223 out of that barrel.If I am wrong how would lower even know what ammo is in chamber?
     
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  5. Skang

    Skang
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    If barrel is stamped with 5.56, you can shoot both, not vice versa.
     
  6. Russ1590

    Russ1590
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    Thanks you all. I'll double check that. Much appreciated. And sorry for the pathetic question.
     
  7. Trailboss

    Trailboss
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    No worries. Everyone here started by asking questions.
     
  8. gaijinsamurai

    gaijinsamurai
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    These days, buy whatever is available at an affordable price.

    .....like others have posted, your weapon is a 5.56 so you can shoot that and .223.
     
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  9. DoubleTapDrew

    DoubleTapDrew
    Oregon
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    Is the barrel marked 5.56? .223 has a shorter leade (the area in the chamber before it contacts the rifling) and can be more accurate but using hot 5.56 ammo can cause a pressure spike.
    If it's 1:8 I'd bet it's 5.56 since .223 ammo is usually using lighter bullets (<55gr) and doesn't require that aggressive of a twist rate, more like 1:10 or 1:12. You should be good up to 78gr or so but in the upper end of that spectrum you'll need to test the ammo to make sure it works in your rifle.
     
  10. Nwcid

    Nwcid
    Yakima and N of Spokane
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    While this normally makes sense in the case of the AR it is a POOR choice. There are so many AR's in so many calibers the only RELIABLE way to tell the caliber of an AR is what is stamped on the barrel.
     
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  11. Grunwald

    Grunwald
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    you're right (as is Skag).
     
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  12. Captain O

    Captain O
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    It is good to ask questions. Buying ammunition blindly can get you into trouble.

    All the best.
     
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  13. PaulB47

    PaulB47
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    Where is it normally stamped on a barrel? Under the handguard? :confused:

    I know you're not supposed to shoot 5.56 in a gun marked .223, but I wonder really how dangerous it is. We're not talking "blowing up the gun" dangerous, are we? It's hard to imagine a bolt gun having trouble with it...

    BTW if the gun is marked ".223 Wylde", then both kinds of ammo are supposed to work. Just to add confusion to the picture!
     
  14. Captain O

    Captain O
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    Do you really want to risk it? Why abuse your rifle?
     
  15. Page.k

    Page.k
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    The 223 Wylde is a hybrid .223/5.56 chamber that should be able to use either type of ammo. The chamber is a mix of the two chambers that should give you a wider range of ammo loads that it can safely use. It's not a SAAMI spec chamber so if you start reloading it's best to ask your barrel maker to cut you a set of reloading dies or recommend a type to buy. The chamber can be best called a Wildcat chamber that is widely used. Like some US made 7.62X51mm NATO rifles have 308 chambers. o_O
     
  16. Page.k

    Page.k
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    WoW this is from back in 2013....

    "Rise from Your Grave!" - Altered Beast - YouTube
    youtube.com/watch?v=hihEhsdwiIk
     
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  17. rick benjamin

    rick benjamin
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  18. Boboclown

    Boboclown
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    5.56 has thicker brass so to make up for it, faster powder is used. This results in higher chamber pressure. So yes you run that risk. Might be rare, and the gun blowing up could be the result of something else, but its possible.
     
  19. Stomper

    Stomper
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    I know this is a necro-thread, but since it's an important issue because AR15 platform rifles are so ubiquitous I'll just point out for the benefit of any lurkers around here that are trying to learn something...

    I own a Colt AR15A2 Sporter-II that is marked ".223 Remington" on the lower receiver, yet the barrel between the flash hider and front sight post is stamped "CL MP 5.56 NATO 1/7". That means it's chambered for 5.56 NATO ammo (safe to also shoot .223Rem), "MP" (sometimes it'll say "MPI") means the barrel was tested for (internal/external) flaws using the "Magnetic Particle Inspection" method, and the "CL" means the bore is Chrome Lined.

    Go with what's stamped on the barrel, as shown in post #17 ;)
     
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  20. Logan Wilson

    Logan Wilson Bronze Supporter Bronze Supporter

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    I have a .223 Wylde is this barrel designed to shoot both rounds? so far i have only put .223 through it.
     

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