Well, I promised an update. Here are the facts.
We got the rifle back, it took about 5 weeks and 4 or 5 calls. It returned with a paper stating this as the repair.
Chamber too tight. Polish chamber and test fire 10 rounds. Cycled well.
Those are not the exact words but close.
So my buddy brought it over, we remounted the scope and bore sighted it. I did a thorough bore clean and chamber clean. I was not going to be able to go shoot with him so he bought some remington ammo like they recommended and used at DPMS.
It cycled and shot well. But I still am not liking what I see on the brass.
Here is a pic of one of the fired cases. It is hard to show in a pic, but I think you can see that the primer is slightly cratored and flattened. Also brass is pushed into the ejector pin hole and is smeared as it is rotated during ejection. That is evident on both sides of the "M". I expect this to be worse with the Federal ammo. We will try some of it soon.
Am I being to picky?