The expansion at the web and headspace are two different things. It's normal for some expansion of the diameter of a fired case to take place. How much is dependent on where one starts with the brass and what the chamber diameter is at that point.



What do your fired cases measure at some exact point from the base or mouth? There are chamber tolerances.



As to the no go gage. A gage can close on such a chamber and still be a servicable chamber. It depends on how much over it is! Cut a small piece of metal from a beverage can and measure it's thickness. It should be around .004" Drop this little coupon on the back of the gage when it's in the chamber and try to close the bolt on it. If it easily closes that's too much for me.



At that point I would contact Remington. Good luck with that.



Tell us what your measurements are.

put a single layer of masking tape on your no-go gauge this will add approx. .003(a make shift field gauge. Now this is the most important part, the bolt MUST be stripped to properly check headspace- this means no ejector and no firing pin. Checking headspace with an assembled bolt can damage your chamber, because you cannot feel the actual resistance.(forcing a steel gauge into a chamber with the camming power of a bolt can damage things)Many factory rifles will take the no-go gauge, but will not take the field gauge- safe yup, but as suggested by some of the other posters you will need to adjust your sizing die to only resize to fit YOUR chamber.
Think about the "extra" powder space the factory gave you for free!


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