Learn me sumtin .223 vs 5.56mm

Discussion in 'AR-15 Discussion' started by PSmitty1, Feb 4, 2011.

  1. PSmitty1

    PSmitty1 New Member

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    Ok just starting to look into the AR platform and I'm looking to be educated here.I see AR's chambered in .223 and 5.56mm. I also see .223/5.56mm.

    Now it's my understanding that 5.56 round has a higher pressure than a .223 round. So it is not safe to fire 5.56mm in a .223 chambered AR. While you can fire a .223 in a 5.56mm chambered gun but with less accurracy. Is this correct?

    What do most of you guys shoot?
     
  2. Quentin

    Quentin New Member

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    You're absolutely right, Smitty. Most recent ARs are chambered in 5.56 NATO so they fire 5.56 and .223.

    Most of the ammo I fire is cheap steel case, Wolf, Tula, Herter's, whatever's on sale. Same goes for the brass cased stuff, what's on sale. So that's 55gr .223, I'm zeroed for it and use it.
     

  3. JonM

    JonM Moderator

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    just make sure your barrel is chambered for 5.56 and you can fire both safely.

    its kinda like 38special and 357magnum. i see no reason for the existence of 38 special chamberings. same with AR15 no reason for .223 chamberings.
     
  4. mjkeat

    mjkeat New Member

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    Do the competition guys shooting heavy .223 ammo prefer .223 chambering.
     
  5. MrMilspecer

    MrMilspecer New Member

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    I go with the .556 so I can shoot anything and the accuracy is not to bad either.
     
  6. MrMilspecer

    MrMilspecer New Member

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    The bench shooters do prefer a tighter chamber.
     
  7. CHLChris

    CHLChris New Member

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    Jon, I know this is off-topic, but there are a few snubbies for .38spl that are different (shorter) than .357's. S&W 640 in .357 has a 2.25" barrel and the 642 in .38spl has a 1.875" barrel. Since I would never fire .357's out of a snubbie anyway, I'd rather have the shorter barrel (and do).

    .223 chambering lives as a target tackdriver these days.
     
  8. mjkeat

    mjkeat New Member

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    I also like a tight chamber ;)
     
  9. Squirrel_Slayer

    Squirrel_Slayer New Member

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    That's why I am gonna call you "mjskeat"
     
  10. mjkeat

    mjkeat New Member

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    :D.........
     
  11. JonM

    JonM Moderator

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    yes they do. but they get quite anal about their guns they are in a class of their own that really doesnt include the normal AR15 guys.

    i guess thats true, im not a revolver guy prolly why it would never occur to me as i would never reach for a wheel gun as a ccw piece.
     
  12. MrMilspecer

    MrMilspecer New Member

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    Major Skeet perhaps ? :eek:
     
  13. PSmitty1

    PSmitty1 New Member

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    Would it be safe to say that a 5.56 chamber and barrel with 1:8 twist rate would provide wide range of ammunition choices?
     
  14. mjkeat

    mjkeat New Member

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    Major Skeet says, "Si."
     
  15. CHLChris

    CHLChris New Member

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    I don't regret my 1:9 choice as my first 5.56 upper, but my 2nd AR will be 1:8. I'm not a real fan of 55 grains. Definitely 62 grain or better and zombies can really eat up 79 grains like they're goin' outta style. Maybe even 1:7.
     
  16. mjkeat

    mjkeat New Member

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    I want to try a 1:8 and see if itll shoot the light stuff any better than the 1:7. I wonder if a 1:8 would be better w/ 62gr. rounds in a compitition setting?

    Anyone have a lead on some nice 1:8 stainless?