Lyman H&i Sizing Die .457

• .457 sizing diameter: Sizes cast bullets to .457 inch for consistent fit in the bore, which helps support uniform pressure and more repeatable accuracy.
• Body sizing operation: This die is built to size the bullet body cleanly and evenly, making it useful when cast bullets need final diameter control before loading.
• Steel construction: A steel sizing die stands up well to repeated use on the loading bench and maintains its internal dimensions over time.
• Standard 7/8"-14 thread compatibility: The common press thread makes integration straightforward with standard reloading equipment, so it fits easily into an established setup.
• Made in USA: Domestic manufacture is a practical advantage for reloaders who value established production standards and easy continuity within the Lyman casting and reloading system.

About the H&I 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 precise control over final bullet diameter. Within the Lyman lineup, the series sits alongside lubricating and sizing tools used to finish cast bullets for handgun and rifle use. The purpose of the system is straightforward: bring a cast bullet to its intended finished diameter while supporting consistent shape and alignment.

The series is designed around practical bench use. Lyman’s improved H&I dies use 90° hole spacing to aid bullet lubrication, including with harder lubricants, while the tapered mouth helps guide bullets into the die more smoothly. A hardened interior is intended to preserve alignment and maintain a cylindrical bullet shape through repeated use. For reloaders working across multiple calibers, the H&I range is offered in many diameters, making it a flexible part of a cast-bullet setup rather than a one-caliber-only tool.

About the Lyman H&i Sizing Die .457

The Lyman H&i Sizing Die .457 is a single body sizing die made for cast bullets that need to be finished to .457 inch. In practical terms, that final sizing step matters because cast-bullet performance depends heavily on bullet fit. A bullet that is brought to a controlled, repeatable diameter is easier to match to the firearm and load, which can help support cleaner seating, steadier pressure behavior and more consistent downrange results.

This model uses a steel sizing body with a standard adjustment system, giving it the straightforward handling expected from a conventional bench tool. Its standard 7/8"-14 thread compatibility makes it easy to install in common reloading presses, so it fits naturally into an existing loading workflow. As a single-pack standard die, it suits reloaders who need one exact diameter rather than a broader die set.

For cast-bullet shooters, the appeal of this .457 die is not complexity but control. It is intended for the stage where bullet dimensions are finalized, allowing the reloader to standardize projectiles before loading. That makes it especially relevant in bullet casting, where small dimensional differences can affect chambering, bore fit and accuracy. Used as part of a Lyman sizing and lubricating setup, it serves as a dedicated tool for producing uniform finished bullets.

About Lyman

The Lyman Gun Sight Company began in 1878 in Middlefield, Connecticut. From the start, the company developed products for shooters, and it grew into a well-known maker of shooting and reloading equipment. Its range includes reloading dies, presses, bullet-casting tools and gun sights, which makes Lyman especially relevant to reloaders who want one brand with deep experience across the whole loading process.

Lyman acquired the Ideal reloading-tool business in 1925, a step that strengthened its place in the reloading category. The company is now headquartered in Middletown, Connecticut. For products such as bullet sizing dies, Lyman is best known for practical bench tools built around established reloading methods rather than novelty, which is why its name remains closely associated with cast-bullet loading and traditional handloading equipment.

Main Features

• Manufacturer: Lyman
• Made in: USA
• Category: Bullet Sizing
• 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: 11.61 mm
• Bullet diameter: 457.00 inch

Warranty

Lyman covers this product for 2 years. That stated warranty period suits a bench tool intended for regular reloading and bullet-sizing use.