Q. In the Case Neck graphiter instructional video it states to wipe motor mica off the outside of the case neck as it is abrasive. So then what does it do to the expander ball over time in repeated contact with the mica?
A. The surface finish on the inside diameter of the die is a mirror finish, whereas the finish on the expander ball (E-10) is not nearly as smooth. The abrasive nature of the very finely granulated mica has a more damaging effect on the inside of the die then it has on the expander ball.
Posted in: Case Neck Graphiter FAQs