My rifle is a .308 Rem 700 SPS Tactical 20 inch barrel, 1 in 12 Twist. I developed a decent sub-MOA load with used Federal GMM brass, 168 grain Nosler CC bullets, 45.4 grains Varget, CCI LR primers, COAL 2.81. My Shooting Chrony measured an average MV of 2650 FPS. Factory Federal GMM 168 had...