Lyman H&i Sizing Die .446

• .446 sizing diameter: This die sizes cast bullets to a consistent .446 diameter, helping maintain uniform fit in the bore and supporting more predictable accuracy.
• Body sizing operation: The die is built for straightforward bullet body sizing, making it a practical choice for reloaders who want repeatable results during cast-bullet preparation.
• Hardened steel construction: A steel sizing die resists wear from repeated use, so it stays dimensionally stable over time and remains suitable for regular bench work.
• Tapered mouth and hardened interior: Lyman’s H&I sizing die design helps guide bullets into alignment, which supports a more uniform cylindrical shape during sizing and lubrication.
• Standard 7/8"-14 thread: The standard thread pattern keeps the die compatible with common presses, making it easier to integrate into an existing reloading setup.

About the H&I Sizing Dies Series

Lyman H&I Sizing Dies are part of the company’s long-established bullet-casting and reloading range, aimed at shooters who cast their own bullets and want tighter control over finished dimensions. Within Lyman’s lineup, this series works with the brand’s lubricating and sizing equipment to bring cast bullets to a chosen final diameter while also supporting lubrication as part of the same workflow. That makes the series especially relevant for handloaders focused on cast-bullet consistency, whether for handgun cartridges, rifle loads, or general target use.

A defining feature of the series is its emphasis on practical bullet handling rather than complex adjustment systems. Improved 90° hole spacing is intended to ease bullet lubrication, including with harder modern lubricants, while the tapered mouth and hardened interior help the bullet enter the die in better alignment. The result is a design centered on maintaining a uniform cylindrical form and repeatable sizing results. For reloaders who already use Lyman casting tools, H&I dies fit naturally into a bench setup built around bullet casting, sizing, and lubrication rather than cartridge-case sizing alone.

About the Lyman H&i Sizing Die .446

The Lyman H&i Sizing Die .446 is a single body sizing die intended for cast bullets that need a finished diameter of .446. In practical terms, that specific sizing dimension matters because cast-bullet performance depends heavily on fit. A bullet that is sized consistently is easier to lubricate properly, seats more uniformly, and can contribute to steadier downrange behavior than bullets with noticeable diameter variation.

This model uses a steel sizing body with a standard adjustment layout, keeping operation simple for reloaders who prefer durable, conventional tooling. The steel construction is well suited to repeated bench use, while the standard format makes it easy to incorporate into established loading routines. With standard 7/8"-14 thread compatibility, it fits common presses and supports a straightforward setup without requiring specialized mounting hardware.

As part of Lyman’s H&I system, the die also benefits from the series design features that matter during actual use: a tapered mouth to help start the bullet straight and a hardened interior that supports alignment through the sizing process. For reloaders working with cast bullets, those details are useful because they help preserve bullet shape while bringing diameter under control. The result is a practical bullet-sizing tool for shooters who want repeatable cast-bullet preparation with a clearly defined final diameter.

About Lyman

The Lyman Gun Sight Company began in 1878 in Middlefield, Connecticut, and the brand has long been associated with practical tools for shooters and reloaders. Lyman makes equipment and accessories for shooting and reloading, with product lines that include reloading dies, presses, bullet-casting equipment, and gun sights. That broad focus is especially relevant here, because bullet-sizing tools like this one sit within a larger system of casting and handloading equipment rather than as stand-alone accessories.

Lyman acquired the Ideal reloading-tool business in 1925, which helped establish its place in the reloading field. The company is now headquartered in Middletown, Connecticut, and it remains well known for combining traditional shooting-tool categories with modern reloading equipment. For reloaders, the brand’s reputation rests on bench tools designed for regular use, straightforward operation, and compatibility with established handloading practices.

Main Features

• Manufacturer: Lyman
• Made in: USA
• Die operation: Body sizing
• Pack size: Single
• Die type: Standard
• Bushing: No
• Case type: Universal
• Sizing die material: Steel
• Material: Steel
• Adjustment: Standard
• Press compatibility: Standard 7/8"-14 thread
• Bullet diameter: 11.33 mm
• Bullet diameter: 446.00 inch

Warranty

Lyman provides a 2-year warranty for this product. That stated warranty period suits a bench tool intended for regular reloading and bullet-casting use.