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Centerfire Rifles - Semiautomatic or Gas Operated Centerfire rifles, carbines and other gas operated rifles.

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  #1  
Old 03-02-2008, 4:33 PM
firegabe firegabe is offline
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Default ??Can you shoot 223. in a 5.56 barrel??

I'm sorry if this is in the wrong forum but I'm learning my way around.

I've just heard that it's really bad to shoot 223. ammo in a chambered and marked 5.56 barrel, that it will damage the barrel/upper.

Thank you in advance on your thoughts and comments.

Gabe
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  #2  
Old 03-02-2008, 4:36 PM
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.223 in a 5.56 barrel is fine,5.56 out of a .223 barrel is not recomended
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  #3  
Old 03-02-2008, 4:36 PM
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yes.

This is required reading:

http://www.ammo-oracle.com/
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  #4  
Old 03-02-2008, 4:37 PM
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It the other way around! It can be unsafe to fire 5.56 out of a chamber/barrel that is rated for .223.
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Old 03-02-2008, 4:37 PM
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I believe it is the other way around.

And just so you know, MOST barrels will be fine. The problem is that bad, old, worn, out of spec, etc barrels may not be able to handle the pressure of the 5.56 and it may cause barrel failure. The 5.56 is also slighly longer, but it's negligble in most semi-auto firearms as the chambers are made slightly looser than a bolt gun to improve feeding reliability. The pressure difference isn't much, but when you factor in two or three of the caliber's differences and it can cause problems. Again, this is for faulty barrels to begin with. If you have a new quality barrel from a quality manufacturer it shouldn't matter if you use .223 or 5.56.
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  #6  
Old 03-02-2008, 4:47 PM
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It's the other way around. .223 in a 5.56 chamber is perfectly fine.

5.56 in a .223 chamber is a no-no.
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Old 03-02-2008, 5:25 PM
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I'm real new to these rifles as well. The oracle has a lot of useful information. I noticed on Rock River Arm's site, they state their carbines are cambered for .223/5.56 NATO. I'm assuming then that they design these primarily as 5.56 and you can use the .223. Is this the case?

Anyone have any info on Rock River Arm's Wylde chamber? Unless I am reading their site wrong, you can use either .223 or 5.56.

Am I wrong about this?

Last edited by jojo760; 03-02-2008 at 5:34 PM..
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  #8  
Old 03-02-2008, 5:30 PM
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Quote:
Originally Posted by jojo760 View Post
Anyone have any info on Rock River Arm's Wylde chamber? Unless I am reading their site wrong, you can use either .223 or 5.56.

Am I wrong about this?
You should be fine. A Wylde is designed for both.

Frankly a modern AR from a quality vendor with bbl marked 223 should be able to shoot 5.56 without danger.
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  #9  
Old 03-02-2008, 5:39 PM
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Read the Ammo Oracle! There's so much information that you'll need to read it several times.
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  #10  
Old 03-02-2008, 5:40 PM
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.223 Win in a 5.56 Nato: Yes
5.56 Nato is a .223: Not Advised

Not only will you have "issues" in the guns cycle of operations, there are two major factors:
1) The 5.56 NATO round has a higher chamber pressure (yes the round looks the same but the casing is almost twice as thick) then the .223 Win
2) The throat of the chamber is different. The 5.56 Nato chamber is much looser then the .223 Win, that is why you can fire both. However, when you take a .223 Win chambered barrel (that already has a tight fit) and shove a 5.56 Nato into it, with it's higher chamber pressure and all, it can cause real problems.

Hope that helps.
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Old 03-02-2008, 5:42 PM
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Read this and it will all become clear.
From Winchester Ammo.
http://www.winchester.com/lawenforce...spx?storyid=11
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Old 03-02-2008, 6:04 PM
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The Wylde chamber is a compromise to allow both .223 and 5.56 to be shot accurately.

Do a search on Randall's website or look for postings from him @ Wylde. He posted a diagram with dimensions that would help you understand.

The Wylde chambering is the go-to size for a shooter.
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  #13  
Old 03-02-2008, 6:52 PM
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Default Do not shoot .223 out of a 5.56 NATA

From what I have been told from a few gun dealers. Do not shoot non .223 in a gun that requires NATA 5.56 ammo.
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  #14  
Old 03-02-2008, 6:55 PM
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Quote:
Originally Posted by 13luck View Post
From what I have been told from a few gun dealers. Do not shoot non .223 in a gun that requires NATA 5.56 ammo.
Huh? non-.223? NATA? I'm not quite sure what you're saying here, buddy.
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  #15  
Old 03-02-2008, 6:59 PM
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Here are dimensions

The pressure issue is yet another one to be considered for older .223 barrels.

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  #16  
Old 03-02-2008, 7:04 PM
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So my Colt AR-15 SP1 is marked .223 on the reciever. Should I not be firing 5.56 ammo? Which "camber" does my upper have? This rifle was born sometime in the early 80's. I wonder if 5.56 was uncommon vs. .223 back then?
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  #17  
Old 03-03-2008, 4:58 AM
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Quote:
Originally Posted by strega7 View Post
So my Colt AR-15 SP1 is marked .223 on the reciever. Should I not be firing 5.56 ammo? Which "camber" does my upper have? This rifle was born sometime in the early 80's. I wonder if 5.56 was uncommon vs. .223 back then?
A gunsmith can tell you very easily.
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  #18  
Old 03-03-2008, 6:59 AM
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When in doubt, call the Mfg. I purchased a used Ruger Mini-14 Ranch a while back and it did not come with the manual, the barrel is stamped .223. I called Ruger on this same question. They told me that it is OK to use .223 or 5.56 and they also sent me a manual. The manual states .223/5.56, either one is OK to use in the Mini-14's.
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  #19  
Old 03-03-2008, 7:00 AM
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Quote:
Originally Posted by TonyM View Post
yes.

This is required reading:

http://www.ammo-oracle.com/
This address is obsolete. The new one (with pictures that actually work and more data) may be found at:

http://ammo-oracle.ar15.com

-g
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