07-08-2018, 10:30 PM
Sounds like you have an issue with some other kind of movement or fit. All fhinks beink ekual... choo shud git ekual wesults. Something is changing on you between trips.
Check everything, accessory mounts, optic mounts, (sounds like you've been over this road), handguard and barrel nuts, gas tube clearence, look for gas leaks (if there is a big enough leak, then your pressure could be spiking/curving differently on each trigger pull, changing lots of unusual things - like harmonics). If all else fails, a complete disassembly, heavy cleaning, bedding, reassembling, and torquing are my next bet. If that doesn't work, then the manufacturer of the barrel needs a call.
Best of luck, I know chasing rabbits down holes isn't the most fun you can have on Grendelback, but even if it's not the problem, the disassembly and reassembly process will kill a good afternoon, a cigar, and a few cold drinks. And then there's the fun of shooting to proof it again.
I'm with Sneaky, why no name on just the barrel?
Check everything, accessory mounts, optic mounts, (sounds like you've been over this road), handguard and barrel nuts, gas tube clearence, look for gas leaks (if there is a big enough leak, then your pressure could be spiking/curving differently on each trigger pull, changing lots of unusual things - like harmonics). If all else fails, a complete disassembly, heavy cleaning, bedding, reassembling, and torquing are my next bet. If that doesn't work, then the manufacturer of the barrel needs a call.
Best of luck, I know chasing rabbits down holes isn't the most fun you can have on Grendelback, but even if it's not the problem, the disassembly and reassembly process will kill a good afternoon, a cigar, and a few cold drinks. And then there's the fun of shooting to proof it again.
I'm with Sneaky, why no name on just the barrel?
Nothing kills the incentive of men faster than a healthy sense of entitlement. Nothing kills entitlement faster than a healthy sense of achievement.