The Lyman H&I Bullet Sizing Die .309 is an essential tool for precision reloading. Designed for use with various bullet diameters, this die features an improved design with 90-degree hole spacing for optimal performance. The hardened interior and tapered mouth ensure proper alignment, resulting in an outstanding cylindrical shape. Compatible with both Lyman and RCBS products, this bullet sizing die is a must-have for serious reloaders looking for quality and reliability in their ammunition crafting.