Magtech/CBC 77gr OTM is my preferred 'serious' use ammo.
I seriously love this round.
Accuracy is excellent, velocity is excellent @2650fps(same as BH), and price @ $0.55/rd is the best in its class.
After shooting about 1200-1400rds of Magtech/CBC 77gr OTM through my SR15 Mod1 (16" CHF CL 'LW' 1/7 Barrel), I confirmed my rifle to be 1.25MOA capable(10rd group), using that particular round.
Using my only 'DMR' rifle, the SR15 Mod1 LPR w/ its SPR profile Krieger 18" SS 1/7 twist barrel, I can do 0.8-1.0 MOA 10rd groups.
Here are some accuracy samples of my SR15 Mod1 (16" CHF CL 'LW' 1/7 Barrel) w/ ACOG 4x TA31F at 300 yards, using Magtech/CBC 77gr OTM, on a shooting sled.
Old picture of the gun. SR15 Mod1 (16" CHF CL 'LW' 1/7 Barrel) It has 15,500rds through the barrel when I did the accuracy test.
Same optic, TA31F, but currently has a PA EFAB comp, A1 PG, and Tangodown VFG.