When Do I need to use a Factory Crimp Die?

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.