Within your parameters, yes, I'd build a .243.

With that said, I really have to agree with Tyrone due to all handling and weight benefits and better parts commonality of the with the AR15 platform.

If you like the idea of a 6mm bullet, you can splint the difference and barrel an AR15 in 6x45.

Last edited by antelope_sniper; 01/12/20.
You didn't use logic or reason to get into this opinion, I cannot use logic or reason to get you out of it.

You cannot over estimate the unimportance of nearly everything. John Maxwell