Why Oh WHy

[stanc]

I just bought the last one of these. I couldn't resist the price.
I posted back in the spring how I would end up at 6x45.
https://truesportingarmsllc.com/product/...r-tc-mach/

This article influenced my decision. Now I need dies.
http://www.chuckhawks.com/6mm_military_cartridge.htm

6mm-.223 would not be my choice for a 6mm "main battle cartridge able to carry the goods to 600-800 meters in a suppressive fire mode from a machine gun, and to 500-600 meters from a rifle."

If limited to 5.56x45 COL, I'd opt for the 6x41 (6.8 SPC parent case, shortened and necked down). Uses longer, more streamlined, higher BC projectiles than the 6x45, driven to faster velocities.