Lyman's redesigned sizing dies incorporate 90-degree lubricant hole spacing, allowing even the toughest bullet lubricants to flow evenly and thoroughly during the sizing process. The flared mouth ensures smooth bullet entry, while the fully hardened internal die surface maintains bullet integrity by delivering exact concentric shaping. Sized precisely for recommended rifle and pistol calibers, each die supports maximum accuracy and extended brass life. Lyman's matching top punches are crafted to align perfectly with specific bullet nose geometries, preventing unwanted nose deformation while enhancing overall sizing accuracy and bullet consistency. Constructed with high-grade hardened steel for maximum strength and resilience The tapered mouth design improves feeding and reliability in your firearm 90 degree lube holes facilitate optimal lubrication for smooth mechanical operation Compatible with RCBS punches for versatile reloading options