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Posted: 11/19/2008 2:56:38 PM EDT
I know this has been discussed here, but I haven't found a real answer to my question. I know there is a slight difference between the two rounds, and to shoot whatever your rifle is marked with, as thats what it is built for. But what if your AR is marked ".223/5.56"?

I'm ASSuME-ing that it would be fine to shoot both, but being a complete novice at the game, figured I'd make sure.

Link Posted: 11/19/2008 2:59:05 PM EDT
Are there any markings on the barrel?
Link Posted: 11/19/2008 3:04:20 PM EDT
Read this.
Link Posted: 11/19/2008 3:04:25 PM EDT
Barrel is marked 5.56 NATO

Link Posted: 11/19/2008 3:06:14 PM EDT
Your 5.56 barrel can handle either.
Link Posted: 11/19/2008 3:07:58 PM EDT
[Last Edit: 11/19/2008 3:09:26 PM EDT by cerberus212]
If the barrel is marked 5.56 then you can shoot both .223 and 5.56.
Generally you shouldn't shoot 5.56 through a .223 marked barrel. Excessive pressure could result. The .223 only barrels are generally for users that want a more accurate rifle.

The wylde chamber is compromise between the two and allows both rounds to be shot with good accuracy.
Link Posted: 11/19/2008 3:11:54 PM EDT
Thanks for the quick response. I appreciate it.

By the way, ftwm, your sig is priceless

Link Posted: 11/19/2008 5:28:41 PM EDT
GTG with both types.
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