Lyman H&I Bullet Sizing Die .512"

The Lyman H&I Bullet Sizing Die .512" is a precision reloading tool engineered for handloaders working with large-diameter bullets in big-bore rifle cartridges. This sizing die features hardened interior surfaces and a tapered mouth designed to ensure proper bullet alignment and consistent cylindrical geometry, critical specifications for achieving reliable chambering and consistent ballistic performance across repeat firings.

The .512" bore diameter accommodates larger hunting and long-range rifle cartridges where bullet sizing precision directly impacts accuracy and case longevity. The 90-degree hole spacing on this Lyman sizing die allows for proper die mounting on standard reloading presses, ensuring repeatable setup and alignment shot to shot. The tapered mouth geometry guides bullets smoothly into the sizing chamber without deformation, preserving bullet integrity during the sizing process—a critical consideration when working with premium components where dimensional consistency determines field performance.

This tool is designed for serious rifle reloaders, hunters pursuing large game, and long-range precision shooters who cast or source custom bullets requiring sizing before loading. Lyman's reloading and casting equipment has established itself in the handloader community for producing tooling that meets exacting dimensional tolerances. The H&I line specifically serves the segment of reloaders working outside standard commercial ammunition, where component control and consistency determine whether ammunition performs reliably in the field or fails critical tolerances during chamber cycling.