Do I have a Brass or Chamber problem?

[Red Dot]

Back from range. Made a correction on the origional post the measurement was .3757 not .377.

I fired 16 rounds the average fired diameter was .3745 which is normal.
All ejected normally, after firing and trying them 6 were hard to open and close. I could rotate the brass and finally get a spot where they would open and close properly. They were a little out of round, I full sized them and they opened and closed properly.
The extractor is tight and that may have a bearing on the out of round.

Jerry