- Made from case hardened steel
- Precision-drilled and reamed to the same exacting standards as the finest gun mechanisms
- Full-Length Sizer Dies for bottleneck cases have vents to prevent case damage
- Properly hardened and hand polished
RCBS pioneered and developed 3-Die Sets for straight-wall rifle and pistol cases. The Carbide Sizer Die sizes the case and de-primes (the carbide sizer ring eliminates the need to lubricate). The 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.