RCBS Cowboy Dies - Manual (Page 9)

a sized case in the
shell holder and
run it into the
expander die. The
case mouth should
be expanded and
flared (belled) just
enough to accept
the bullet when
placed on top of
the case. The expander is tapered and may be adjusted for
more or less flaring (belling) by loosening the lock ring
on top of the die and turning the expander up or down.
BULLET SEATING AND CRIMPING FOR
ROLL CRIMP
IMPORTANT: Please read instructions carefully. Do not
adjust the seater die down against the shell holder as it will distort or crush the
case. If the bullet you are using has a crimping groove, the bullet can be seated
and crimped using the following instructions. Before proceeding, cases must be
trimmed to the same overall length to assure a consistent crimp. The crimping
feature is machined into the seater die body. It is not a special attachment to
the seater plug. The die must be moved up or down to obtain the proper crimp
adjustment. To adjust, the seater die, place a sized, primed and powder-charged
case into the shell holder and run it to the top of the press stroke.
Screw the seater die into the press until you feel it touch the mouth of the
case. Back the die up one full turn and set the large lock ring. This will leave a
gap between the bottom
of the die and the shell
holder. Next, lower the
case and insert a bullet
in the case mouth.
Slowly run the case and
bullet into the seater die.
Check the bullet for
proper seating depth. If
the bullet is not seated
properly, adjust the
Screw the sizer die into the
reloading press. Notice the sizer die is adjusted so
it contacts the shell holder.
The standard RCBS steel die is shown on
the left. The carbide insert is visible in the
carbide sizer die on the right.
Seater dies in our 3-die sets
use a “through-the-top”
style seater plug as shown
above.This allows for easy
cleaning.