Originally Posted by
westtexducks
Wow you learn something everyday i always thought they were the same cartridge, just a different name kinda like the .223 and 5.56x45mm. This is one of the reasons I love coming to this site I am always learning stuff.
Same difference, .223 or 5.56 and 308 or 7.62x51mm. They are basically the same, but they are different enough in there own rights to be labeled as such. The 223 and 5.56mm are both using the same powder, bullet, and primer. The cases are just enough apart that you have to be able to really know to use a micrometer and the barrel chamberings are slightly different as well to tell them apart. More gov't BS!!! LOL!!!