If you are looking for a factory loaded AR-15 cartridge to hunt yotes, deer and hogs the 6.8 can't be beat in terminal performance. The exterior ballistics of the 6.8 and Grendel are within a few inches of each other all the way to 400yds. The 6.8 starts off 80-100fps faster with the same weight bullet and barrel length. The 6.8 has a great selection of usable hunting bullets. A 5.56 and a 6.8 could handle every possible need.
Our throat/freebore is designed to be more accurate with a wider range of bullets than the typical SPCII chamber.