VPSowner

I appreciate the replies. As to the moly-grease on the bolt lugs, is that only during the break-in period, or is that something you do during your normal maintenance during the entire service life of the rifle? One last thing. I forgot I had a POF roller cam at the shop, and threw it into my bolt carrier after it's first range trip. I have confirmed with POF that its compatible with my build, but was curious if anyone else had results from making that swap. It has made my bolt noticeably easier to cycle, but I'm worried it might provide too little resistance for long-term use. I've just got it oiled now, but I'm considering using the moly grease on the roller cam as well, at least during break-in.

Forgot to add the mag details. I was using a Magpul Pmag, although I'd like to try some other DPMS compatible magazines down the road just because. While not really interfering with the rifle functions, I did have one issue with the Pmag. There were a few times the rifle would lock back on an empty mag, but the bolt was only caught on the magazine follower, not the bolt catch. The CMMG bolt catch can find a way to slip behind the follower, forcing the follower forward and up to catch the bolt. I've ordered a DPMS bolt catch, thinking the extension might be long enough to assure better contact. It only did this using the 147grn 7.62x51mm, the Tula 150grn .308 always functioned properly. While not a knock on CMMG, I've had this bolt catch issue happen on an AR-15 built with their lower parts kit before. One just did not make good contact with the back of the follower, and needed to be replaced. I actually have a lot of respect for CMMG, and it's just a coincidence that they were supplied with a part that didn't meet spec, that's not something they make themselves.

Just got in the last of the parts to put together my first .308. Took it to the range today, function was good, but accuracy was sub-par. Most of that is probably due to the ammo, which I fully recognize was a poor choice, but I've had better results in another rifle with the same twist. I was mostly using Magtech CBC 147grn 7.62x51mm Brazilian made ammo. Accuracy at 100 yards was disappointing, shots formed a circle about 4" wide. Several times the rifle would fail to feed, the round was left in the magazine, and the bolt traveled right over it. Fired about 30 shots, had four of these failures to strip the next round from the mag. I can't recommend this ammo, even though it's brass case, it's not terribly consistent. Also used Tula 150grn .308 for 10 shots. Every round functioned perfectly, but accuracy was still about 2-3" wide circle at 100 yards. I did not bring any heavier bullets out, I was just trying to break the rifle in some, and I don't have a lot of the 180grn to plink with. The rifle is built using a CMMG lower, LPK, bolt group, and 18" SS barrel (mid-gas, 1:10" twist). DPMS upper, Troy gas block and rail, PWS FSC muzzle brake. Heavy weight buffer and .308 carbine buffer spring. Never had failures to eject, and recoil is very light (less noticeable than my piston-driven 6.8SPC). I have a Remington 700 AAC rifle with the same 1:10" twist, it will return respectable groups with the Tula 150grn .308, even though it prefers the 180grn heavier loads. I'm hoping this rifle tightens up some when I'm able to feed it better ammo, even as a dealer, it's hard to order ammo these days.