I was wondering how many reloaders polish their neck sizer buttons???? I started working up some .375 H&H loads the other day and forgot to polish the sizer button on the resizing die I got used from another forum member. I use carbide sizers on all my other dies and didn't think about it until I felt the resistance on the press handle. I do lube the necks but it was still taking much more force than with my other dies. I have always polished all my sizer buttons to reduce friction. I have some to be extremely rough from the factory. I polish the carbide ones too, but they seem to come smoother.
I removed the stem and chucked it in my drill and put some JB bore paste on a soft cotton rag and spun it to polish it nice and smooth. I cleaned it well and reinstalled it.
There was a noticeable difference in the force and I can't help but believe that it is easier on the brass.