I picked up my Remington 40X this afternoon from the FFL and looked it over. It looks pretty good. I particularly gave the barrel a good look and it looks pretty good to me. A commentor on another forum suggested that I look the rifling over carefully, particularly near the chamber. He advised that the barrel might be shot out if there was little or no rifling ahead of the chamber. The rifling looks sharp and crisp at the muzzle and as best I could tell, it wasn't a whole lot different at the chamber end. The rifling went all the way to chamber.
I couldn't find my CMP muzzle gauge, but gave it the "bullet test" with a 175 gr Nosler CC and the bore seems tight.
I tried to take a few pictures, but didn't have a lot of luck. I got a few fair ones at the muzzle, no luck at all getting anything from the chamber end.