Double checked gas key by instering bolt really slow and felt no snags. Also did not see any junk near gas block so I am really thinking that I dont have a gas issue. After thinking about it more, the YHM gas block has a HUGE gas hole compared to the one on barrel so if I missed, I woulda had to miss by quite a bit and the thing looks really, really straight.
Oops. I wrote my last post without realizing there was a whole second page of responses that already covered what I wrote. However, I still would recommend doing the check on gas tube/gas key alignment the way I described; when you check it with the BCG fully assembled it can sometimes be less obvious what's happening.