On the issue of internal neck friction that is the result of totally clean cases, as it relates to bullet seating force and pull, as well as what has been called "cold welding" of bullets in case necks over time, I have done a little research and came up with a couple of methods that ma help, that I thought that I would pass along.
Todd Kindler sells a water and wax based case lube that dries so that it will not catch powder if it is applied to the inside of case necks with a Q tip and allowed to dry. Also, when a friend loads for calibers that are primarily used for big game, in quantities that may span several years use, he puts a little Imperial case lube on the index finger and thumb of one hand, and rolls bullets between them as part of his seating procedure.