06-05-2021, 05:08 PM
If an unfired cartridge is not sticking in the lands and can be extracted by the charging handle then more than likely a gas issue. Here are some gas port sizes for various 6.5 Grendel barrel lengths. It wouldnt be the first time a barrel was shipped with an undersized gas port. Also look for gas leakage on the bolt carrier gas key and gas block.
6.5 Grendel gas port sizes
12 Faxon GB .068 CLGS.
16 Carbine G. 0625
16 Faxon GB .078 MLGS
16 Group Buy Green Mountain .076
18 Faxon GB .076 MLGS
20 Rifle LG .0935. same as 5.56/223
18 RLGS .094
6.5 Grendel gas port sizes
12 Faxon GB .068 CLGS.
16 Carbine G. 0625
16 Faxon GB .078 MLGS
16 Group Buy Green Mountain .076
18 Faxon GB .076 MLGS
20 Rifle LG .0935. same as 5.56/223
18 RLGS .094