This Factory Die incorporates a collet to apply a rifle type crimp to the case, which makes these very difficult to crimp cartridges a delight to reload. Bullets do not need a crimp groove, as the collet is so powerful it will form one.
Specifications:

Type	Factory Crimp Rifle Die
Caliber	300 Winchester Magnum
Die Type
Die Series	Crimp
In Set	1
Metal Type
Adapt to Mfg
Shell Holder
Shell Holder Cap