Barrel caliber question

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[ARCHIVED THREAD] - Barrel caliber question

Posted: 10/31/2009 1:59:16 PM EDT

Hello,

I know that if your upper is chambered for 5.56 it can shoot .223 but a .223 can't shoot 5.56 and I understand why. My question is, does the same hold true for barrels?

Thanks in advance.

Posted: 10/31/2009 6:26:01 PM EDT

[#1]

Both cartridges run a .224 bullet so the barrels are identical.

Posted: 10/31/2009 9:11:13 PM EDT

[#2]

It is the chamber part of the barrel that is at issue. The bore of the barrel is the same and the upper receiver itself is the same.

Posted: 11/1/2009 9:14:30 AM EDT

[#3]

Im sorry, I wasnt thinking right when I posted that. lesm is completely right, the barrel is what matters with the chamber issue.

Posted: 11/1/2009 10:28:01 AM EDT

[#4]

So you can't shoot 5.56 in a .223 chambered barrel?

Posted: 11/1/2009 1:27:22 PM EDT

[#5]

No, the first few inches of the barrel is the chamber. So i your barrel is chambered for .223 you cannot shoot 5.56.

Posted: 11/1/2009 1:46:16 PM EDT

[#6]

Thanks.

Posted: 11/3/2009 10:59:06 AM EDT

[#7]

Quoted:
So you can't shoot 5.56 in a .223 chambered barrel?

It is not ah, recommended. .223 chambers have a short throat that can cause the pressure to exceed the design pressure when fired using .5.56 NATO ammo.

[ARCHIVED THREAD] - Barrel caliber question

AR-15 » Rifles, Uppers, Lowers, Barrels, and more

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