RCBS's Carbide 3-Die Set features a Carbide Sizer Die sizes the case and de-primes (the carbide sizer ring eliminates the need to lubricate). Its Expander Die expands the case to the proper diameter to accept the bullet, and it imparts case mouth flare/bell for bullet feeding. The Seater Die seats the bullet and roll crimps.
Specifications:

Type	Carbide 3-Die Set
Caliber	460 Smith & Wesson Magnum
Die Type	Roll Crimp
Die Series
In Set	3
Metal Type
Adapt to Mfg
Shell Holder
Shell Holder Cap