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southfork | 12-08-2009 09:18 PM
.223/5.56 I saw a upper on gunbroker that mentioned it can use either cartridge, I thought both were interchangeable any as Ive used both in my bushmaster, something about a slightly larger chamber?

hoarder | 12-08-2009 09:21 PM
Re: .223/5.56 You can use .223 in a 556 chamber but not a 556 in a .223 chamber. Many chambers are designed for both.

southfork | 12-08-2009 09:23 PM
Re: .223/5.56 Quote:
Originally Posted by hoarder (Post 2065983) You can use .223 in a 556 chamber but not a 556 in a .223 chamber. Many chambers are designed for both.
So the preference is the 556 chamber right.

hoarder | 12-08-2009 09:29 PM
Re: .223/5.56 Quote:
Originally Posted by southfork (Post 2065988) So the preference is the 556 chamber right.
Sometimes AR15 buyers will specify the .223 for heavy barrel target/varmint guns. Most are sold with chambers compatible with both but there are some minor variations among them.

TechGuy | 12-08-2009 09:34 PM
Re: .223/5.56 Quote:
Originally Posted by southfork (Post 2065988) So the preference is the 556 chamber right.
For casual shooters? Yes.

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