*UPDATE* Disappointing outcome - first time out with .308 build

[Black_Sheep]

First time out, it chambers a round using the charging handle but won’t feed a round from the mag. The bolt either goes into battery on an empty chamber or drags across the top of the next round and pulls it partially out of the mag and wedges open on top of the case. Spent cases eject cleanly at roughly 4 o’clock. Bolt does not lock back on an empty mag. I believe it’s short stroking. Looking for some troubleshooting guidance, any suggestions?

Details:
Aero carbine buffer tube, 3.8 oz buffer and spring - purchased as a kit
Aero NiB BCG - gas key is tight and well staked
Wilson Combat 16” barrel, non adjustable gas block and intermediate length gas tube
MagTech 147 gr M80 Ball ammo
Magpul pmag- both mags I tried were brand new

Thanks in advance...