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223 rem versus 5.56 Nato chamber dimensions

Kansaswoodguy

Kansaswoodguy

Well-Known Member
Joined
Aug 26, 2014
Messages
773
I found this looking for something else. I found it interesting figured some of you might also.
 

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Obviously the 5.56 spec is loose to maintain operation in harsh conditions and non-reuse of brass.
 
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