Lee's Factory Crimp Die crimps the bullet in place more firmly than any other tool. Tests demonstrate that even bullets which have no crimp groove will shoot more accurately. A firm crimp improves accuracy because pressure must build to a higher level before the bullet begins to move. This higher start pressure insures a more uniform pressure curve and less velocity variation.
Specifications:

Type	Crimp Die
Caliber	357 Sig
Die Type
Die Series	Crimp
In Set
Metal Type
Adapt to Mfg
Shell Holder
Shell Holder Cap