We recommend using the Carbide Factory
Crimp Die for pistol calibers if you would like to separate the
bullet seating and crimping functions, if you have an auto loader
type pistol to ensure the rounds chamber and feed properly or if you
would like to apply the appropriate type of crimp for your handgun
(auto loaders = taper crimp, revolvers = roll crimp).
We recommend using the collet style
Factory Crimp Die for rifle calibers to perform a stronger more
controlled crimp on your rounds, to increase accuracy and when using
the rounds for hunting purposes. This die performs a segmented
straight crimp like factory-made ammunition.
When reloading ammunition for a semi-auto rifle, a crimp should be used to prevent the bullet from coming loose from the case during transport, feeding and firing.