So, I put together a Grendel using one of these. I've been tinkering with it the last few weeks. Accuracy has been good, but it seems over gassed. That's my diagnosis anyway based on ejecting to about 1 o'clock and the brass getting beat up - not terrible - but somewhat more than I would expect. I've been playing with 6.5 Staball starting with 22 Nosler data from Hodgdon's online data. Burn rate is somewhat slower than what most are using in the Grendel (lever, CFE223, etc), but the velocity potential looked good and I had it on hand. I'm waiting on 88 ELDs, it would be a shame not to take advantage of the 6.5 twist, but I've run it up to about 3,050 fps with 75's without trouble.
Other specifics on the build if it helps:
rifle +2 gas
rifle buffer and enhanced spring from here
Rubber City Armory m16 bolt carrier
Maxim firearms 7.62x39 bolt
Aero low profile gas block
So, I figure I have a couple options to tame this thing a bit. Either play with recoil spring and buffer or go with an adjustable gas block. I've seen this buffer talked about. If I change out the gas block I'd probably go SLR. Cost actually looks like a wash, any advantage one way or the other? Slash buffer would add some weight, that's a minor con to me since I like where I'm at right now weight-wise. Any ruggedness/reliability concerns with adjustable gas blocks? I know several of you have put these together so thought I'd check in. Right now, I'm more confident that the gas block would fix everything without excess messing around. But, although I've put a few AR's together, I willingly admit I'm far from expert. For context also, this is mostly a coyote gun.
Other specifics on the build if it helps:
rifle +2 gas
rifle buffer and enhanced spring from here
Rubber City Armory m16 bolt carrier
Maxim firearms 7.62x39 bolt
Aero low profile gas block
So, I figure I have a couple options to tame this thing a bit. Either play with recoil spring and buffer or go with an adjustable gas block. I've seen this buffer talked about. If I change out the gas block I'd probably go SLR. Cost actually looks like a wash, any advantage one way or the other? Slash buffer would add some weight, that's a minor con to me since I like where I'm at right now weight-wise. Any ruggedness/reliability concerns with adjustable gas blocks? I know several of you have put these together so thought I'd check in. Right now, I'm more confident that the gas block would fix everything without excess messing around. But, although I've put a few AR's together, I willingly admit I'm far from expert. For context also, this is mostly a coyote gun.