After chambering one of the tight rounds, what does it look like after it is ejected(unfired of course)...any scuff marks...maybe the bullet is seated out to far, or maybe your rifle has a shorter throat...just a thought
I have a CETME too...its a fun gun, unfortunately 7.62 is a little spendy right now...
Good to hear the Turk is doing OK...Should be a nice gun when finished...