Quote:
Originally Posted by Choker
Isn't 5.56 the exact same as .223
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No, they are not "exactly" the same. Like the post seeric linked to says:
"The primary difference between .223 Remington and 5.56 x 45 mm is that .223 is loaded to lower pressures and velocities compared to 5.56 mm.
.223 Remington ammunition can be safely fired in a 5.56 mm chambered gun, but
the reverse can be an unsafe combination."
"
While the 5.56 mm and .223 cartridges are very similar, they are not identical."
Generally speaking, .223 is more accurate. If you're building a match or precision rifle, like this one, you're going to build it in .223.
Here's another thread on the same forum. Read post #2.
http://www.ar15armory.com/forums/223...-W-t12534.html