The RCBS 3-Die Taper Crimp Set, Group C, for 450 Bushmaster (RCBS part no. 21604) continues RCBS’s 3-die set design for straight-wall rifle and pistol cases. A hardened steel Sizer Die sizes the case (case lubrication required), the Expander Die opens the case to the proper diameter and imparts a case mouth flare for easy bullet feeding, and the Taper Crimp Seater Die seats the bullet while applying the correct crimp for proper cartridge headspacing. Every die in the set is machined to exacting tolerances, hardened, and finished before it ships in RCBS’s signature green box.

Key Specifications

• A hardened steel Sizer Die sizes the case; case lubrication is required.
• The Expander Die opens the case to the proper diameter and flares the mouth for easy bullet feeding.
• The Taper Crimp Seater Die seats the bullet and applies the crimp for proper cartridge headspacing.
• All dies are machined to exacting tolerances, hardened, and finished.
• Ships in RCBS’s signature green box.

Frequently Asked Questions

Does the 450 Bushmaster case need lubrication before sizing? Yes, the hardened steel Sizer Die requires a lubricated case to size properly and avoid a stuck case.

What does the taper crimp do for headspacing? The Taper Crimp Seater Die applies the crimp needed for proper cartridge headspacing on this straight-wall cartridge.

Buy the RCBS 3-Die Taper Crimp Set, Group C, 450 Bushmaster

Load 450 Bushmaster ammunition from sizing through seating with a complete, precision-machined three-die set. Order it from our Lubbock, Texas gun shop, where our gunsmithing tools selection stocks RCBS die sets for straight-wall and bottleneck cartridges alike, with fast shipping to your door.