All RCBS Seater Dies have a built-in roll or taper crimp as appropriate for the particular caliber. To seat bullets without crimping, simply unscrew the die until the crimp ring no longer engages the case mouth.Bullet Seater Die
Plastic storage case
A Bullet Seater is used to push (seat) the bullet down into the case to a specific depth and is found in the Seating die.
Bullet depth is adjusted by screwing the seating stem in and out of the die body.