.223 ammo - Page 2
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Old 10-20-2011, 04:07 AM   #11
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Originally Posted by alsaqr View Post
.223 Remington cartridge case dimensions are identical to 5.56mm case dimensions. The original .223 chamber has a shorter leade than the 5.56mm chamber. A gunsmith friend tells me that no one currently makes a gun with a .223 SAAMI chamber. In any event there are 10-12 different .223/5.56mm chambers.

AR15BARRELS.COM - Technical Documents

It's a myth that 5.56mm US military cases are thicker than .223 cases. It's also a myth that the 5.56mm develops more pressure than the .223.

See Army TM 43-0001-27, chapter 10.

www.dtic.mil/dticasd/sbir/sbir032/a044a.pdf

You got that right, but you can`t argue with some of these people, I even called Lake City which is less than a 100 miles from me & they said there is no difference .223 & 5.56 NATO come of the same line, but O well believe as wish, but some of us know better.
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