Lyman's upgraded sizing dies revolutionize the lubrication process with newly engineered 90-degree lube hole spacing, making them fully compatible with modern, high-viscosity bullet lubricants for consistent, full-coverage application. Each die is constructed with a tapered entryway for smooth bullet guidance and a hardened, wear-resistant interior that guarantees perfectly cylindrical bullet shaping. The die's internal dimensions are matched precisely to recommended sizing standards for virtually all common rifle and pistol calibers. When used with Lyman's precisely machined top punches-each matched to a specific bullet nose geometry-reloaders can count on consistent seating and flawless nose integrity with zero deformation. 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