This is my Christmas present to myself.. Custom built AR10 .308 Rifle that I added a few mods to, basically built this to be a DMR. So far shooting it, it seems to be really picky on ammo. 1:10 barrel with a match chamber, with NATO 150gr it groups about 2" at 50 yards. Buddy I know that shoots alot said that barrel will work really well with the 168gr BTHP, so I'll try that next time. I was just putting rounds through it to get it on paper.