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11/22/2017 10:05:29 PM
Posted: 8/28/2004 1:48:11 PM EST
I'm still confused a little on the differences .:(

with this colt barrel marked(C MP 5.56 NATO 1/7) it's ok to shoot 5.56 x45 and .223, but one marked .223 will only fire >223 remington?

the ammo orical helped , but still left me with questions.

thank you


Link Posted: 8/28/2004 1:51:09 PM EST
It will still fire the other but has a tighter chamber thus producing higher pressure when a round is fired.
Link Posted: 8/28/2004 1:53:02 PM EST
will it take the pressure or should I stick to firing .223?

thanks again

Link Posted: 8/29/2004 4:56:46 AM EST
I've heard arguments both ways but I personally shoot only 223 in my varminter. Better safe than sorry.
Link Posted: 8/29/2004 7:34:19 AM EST
agreed, thanks again.

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