The 6.5G has got to be the most inherently accurate caliber I've ever shot out of an AR right out of the box. It speaks highly of a cartridge designed from concept to work in an AR and work well. It is my backup upper for my 450B when I go deer hunting and a joy to punch paper with. Makes even a mediocre shot like me look like I know what I'm doing. Right after the 450B, it get's the most interest at the range once I come back to the shooting position with my targets. Best group is .29 MOA for five shots at 100 yards. As a caliber, it has taken up to Elk size game (not me) with one shot out at crazy distances. Very efficient use of case capacity. When folks are considering their first alternate caliber AR and ask me which to get, I tell them hands down, from my experience, get a Grendel. They're not rammed down our throats nearly as much as the 300 AAC or the 6.8 SPC lately, but they deliver the goods and you don't have to break the bank rigging one up unless you feel compelled to do so.
My first AR was a Blackthorne (local company) upper kit on an RRA NM lower. The same lower I use for my 450B. While it shot well, it was hard to get enthused with the .223
"poodle shooter" and the upper sat in the safe. When my fancy turned to the 6.5G, I bought a barrel/bolt combo and a magazine for the lump sum of $350.00 and re-barrelled the Blackthorne. The .223 bull barrel and bolt still sits in the safe in case I get the urge to shoot that caliber, but the 6.5G gets the call just about every time I go to the range. It's just that pleasurable to shoot. Great for building your self confidence while the other uppers cool off and definitely good on big game as well as poodles.
Hoot