RCBS Competition Dies - Manual (Page 7)

with factory polishing compound. This compound will scratch and dent cases
unless it is removed.
Unscrew the Expander-Decapping Assembly from the die. Insert a needle,
straightened paper clip or similar object into the vent hole. This will push the
compound into the die body and can be removed by cleaning the inside of each
die using a patch saturated with Outers Solvent.
Important: We find that most scratching of the interior of a die is caused by
grit on the brass surface. The best method for cleaning brass cases of grit is to
tumble them. Tumbling the cases will clean the surface and prevent scratching
the internal die surface. Your cases should be cleaned periodically to protect
both your dies and the gun chamber. The RCBS Sidewinder Case Tumbler and
Vibratory Case Cleaner are recommended for cleaning cases.
As soon as you detect scratches on a resized case, we recommend lightly
polishing the interior wall of the Sizer Die in a lathe–using #320 (fine) emery
cloth to remove dirt and other foreign particles.
Before cleaning the vent hole, unscrew the
expander-decap assembly from the die.
Use a straightened paper clip to clean
the vent hole.