Originally Posted by LDBennett
hunter29180 & stev32k:
I would note that perfectly clean interiors of cases is not necessarily an advantage. The carbon residue from firing is a lubricant for the bullet as it is seated.
The neck tension the case has before bullet seating gives the inside diameter of the case an approximate 0.002 inch interference fit to the bullet (by design). Without the carbon residue the bullet might seat hard, collapsing the case wall.
If you just have to use this cleaning method then use an inside the case neck lubricant. NECO offers a graphite you apply by dipping only the neck into a bottle of small metal balls and powdered graphite. There may be other methods too (??).
I have not noticed a problem with excessive force needed to seat the bullet. The case neck is belled out and the bullet seems to slide in nice and easy with hardly any resistance. When I've had to pull bullets (a lot) I don't see any sign of scraping or scratching on the surface.
I did get resistance when resizing the case and the exterior had some scratches. Spraying them with the dry lube seems to help.
I ran a batch of 9mm cases in the tumbler without decapping first and it took noticeably more force to seat the primer. When they are de-primed before cleaning it feels very smooth when the new primer is seated. If they are de-primed after cleaning it feels kinda rough and takes more force.