Whoever makes their barrels can’t cut a decent chamber consistently. I’ve seen this on their 300 BO and grendels multiple times. I’ve got a 16” Grendel barrel w/gas block and tube that I know functions well. I can’t speak to accuracy mated to your upper, but it’s killed stuff on a buddy’s upper. I pulled it for him to swap for something else. I’ll cut a deal on it, if you want to go that route.
