I have a Redding FL body die and the Type S bushing style neck sizer die. Using my body die I have been bumping my 7mm RM's shoulder .002 after it became snug in the chamber. I measure the headspace with a hornady l-n-l gauge after I bump the shoulder and it is exactly .002. Then I proceed to size the neck with a neck sizing bushing die. I go through a 2-step process of sizing the neck because my chamber isn't very tight. I use 1 bushing to gradually re-size the neck (.004) then use another size busing to get it to where it needs to be. I then remeasure my headspace and have noticed it is moving an additional .002 after neck sizing. I know the neck sizing die doesn't make contact with the shoulder so why is it moving another .002?? I have checked the concentricity and found the runout to be very little (.002). I have the titanium nitride bushings and am not using any lube. Is the force from neck sizing moving the shoulder?? Has anyone else had this problem?