BCM thermo fit upper fun

[mv1arms]

I shot a workup of 8208 XBR from 26.8 to 28.5 with 120gr smks. Didn't notice any overall group improvements from my workup of LVR in the old aero upper. Hard to compare between the two but it was the same bullet. Shot some sub moa groups and some not as good groups. All groups were 5 shots. Standard deviations were single digits for the good groups. Mild pressure signs at 28.5 grains.

Edit: will post the pic when I'm back on my computer.