6mm-223

[merl]

OK, here is a dumb ass I don't know crap question.

If the 6 and 5.56 (.223) both are 45mm in length and using the same bolt, what prevents one from pulling a Tard move like chambering a .223 or 5.56 and pulling the trigger in a 6X45 ?
I can see the oppisite of a 6x45 not fully chambering in a 5.56x45.

Nothing. Firing 5.56 in 6mm wouldn't hurt anything. I would not depend on the larger bore preventing chambering of 6mm in 5.56. It has happened with 300blk in 5.56 chambers...