You don't look foolish. You wanted a 700, so you bought one that you thought was the best bang for the buck. You're not at any fault, other than buying the rifle you wanted. Nobody could have foreseen it having a burr in the chamber. And in all honesty, if that's all that's wrong with it, I wouldn't even really consider it defective, just needs a little polishing up...Especially if you got a good deal on it.
You're going to your smiths anyway, might take the new rifle along with you, and see if he'll polish it out for you... Then you want even have to send it back to Remington, and he can do a quick check-over of the rest of the rifle to make sure everything is good.