Update.
Added a new spring, o-ring to the bolt, went out shooting and had the same issue with the same gun and a brand spanking new BCM rifle. Failure to completely extract and two rounds bound up in the chamber with both rifles. The odd thing is we also had a Frankenbuild with us that ran fine with no issues. We were shooting PMC battle packs initially. We changed over to some Federal and American Eagle and everything ran with ZERO issues.
So FWIW, although at least one rifle bolt did need to be freshened up, the main issue was the ammo. I did a little research and it seems others have had issues with PMC in some rifles.