New Army "Caliber Configuration Study"

[stanc]

No I meant more of an Area of Operation. i.e. the HPBT would likely be the ideal round for Afghanistan. The Frangible or AP would be more of Gen III warfare AOs.

Yeah, I kinda figured that's what you meant. I don't see it happening, though. Armies just aren't that flexible. Even the Marines only adopted the 5.56 Mk318 hollowpoint load (for use in Afghanistan) because of production delays with M855A1 Ball.