I't been so hot here I haven't done much shooting except for pistols (shoot in the shade). This week though I plan to run my new 10.5" upper through the challenge. I have heard good things about the Ballistic Advantage/Aero barrels so we will see how it performs with some 69gr FGMM. After all, short barrels aren't accurate ya know.
I just hope it's half as good as those nitrided barrels Ruger is using in their MPR.