RCBS Gold Medal Dies - Manual (Page 6)

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
chamber of your firearm. 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 rec-
ommend cleaning and lightly polishing the interior wall of
the Sizer Die in a lathe - using #320 (fine) emery cloth to
remove dirt and other foreign particles.
CASE PREPARATION
The key to consistent and accurate reloading - case
uniformity!
Clean and inspect cases before lubricating and sizing.
Discard any cases with indications of a split neck or partial
head separation. Check cases for the correct overall length
and trim if necessary. Cases should be sorted by weight
or water capacity. Uniformity is critical. If bullets are to be
crimped, it is imperative that cases be trimmed to the
same overall length. Trimmed case mouths should be
deburred and lightly chamfered inside and out with an
RCBS Deburring Tool. Flash holes should be deburred
and primer pockets uniformed. Case necks should be
turned or 'peeled' for uniform thickness to allow even and
consistent bullet tension.
Cases must be properly lubricated before sizing. Over-
lubrication will result in a dented case shoulder. Improper
or no lubrication will result in a case stuck in the Sizer Die.
For best results use only RCBS Case Lube-2 applied to
an RCBS Case Lube Pad or RCBS Case Slick spray lube.
The inside of case mouths should be very lightly lubricat-
ed with an RCBS Case Neck Brush. These accessories