12-30-2015, 04:40 AM
GSPHunter Wrote:+1
My 20" 1:9 twist J&T keyholes 127LRX's at 100, and shoots the 140SGK's with mediocre accuracy. If I were to buy another AR grendel barrel, it would definitely be a 1:8 twist. I'd still be seriously interested in a 1:9 Micro, but even more so a 1:8 :-)
I have personally shot all three models, and achieved sub 1" groups with factory Hornady ammo. This from a 20" rifle with a 3-9 power scope. I really don't think you'd have to ever worry about keyholing @100 with this setup.