Lyman H&i Sizing Die .258

• .258 sizing diameter: Brings cast bullets to a consistent final diameter, which helps improve fit in the bore and supports more uniform accuracy.
• Body sizing operation: Sizes the bullet body in a straightforward single-step process, making it well suited to routine cast-bullet preparation.
• Steel die construction: The hardened steel build stands up to repeated use and helps maintain consistent sizing over long loading sessions.
• Standard 7/8"-14 thread: Fits common presses, so it integrates easily into established reloading benches without special adapters.
• Universal case type: Designed for broad compatibility within Lyman’s lubrication and sizing workflow, giving reloaders a practical option for regular cast-bullet work.

About the H&I Series

Lyman H&I Sizing Dies are part of the company’s long-established cast-bullet reloading range, aimed at shooters who want consistent bullet fit and dependable lubrication during bullet preparation. Within Lyman’s lineup, the H&I series supports traditional cast-bullet loading rather than cartridge case sizing, making it a specialized tool for handloaders who cast and finish their own bullets for rifle and handgun use.

The series is built around a simple but effective concept: size the bullet to the required diameter while working with a lubricator/sizer system. Tapered die mouths help guide bullets into the die more smoothly, while a hardened interior supports alignment and helps preserve a consistent cylindrical shape. Lyman also uses 90° hole spacing in its improved sizing dies, which aids lubricant flow even when harder bullet lubes are used. The result is a practical system for reloaders who need repeatable bullet dimensions, cleaner lubrication, and compatibility with a wide range of popular cast-bullet diameters.

About the Lyman H&i Sizing Die .258

The Lyman H&i Sizing Die .258 is intended for cast-bullet reloaders who need a precise .258 inch finished bullet diameter as part of their loading process. In cast-bullet shooting, correct bullet fit is critical: a bullet that is sized appropriately for the barrel can help reduce leading, support better gas sealing, and deliver more consistent downrange performance. This makes a dedicated sizing die like this one an important bench tool rather than a minor accessory.

Its body sizing function keeps operation straightforward, focusing on uniform bullet shaping for repeatable results. The steel construction is suited to regular workshop use and helps the die maintain its dimensions over time, which matters when processing batches of bullets where consistency from one piece to the next is the goal. With a standard 7/8"-14 thread, it fits common press setups easily, so it can be added to an existing reloading bench without changing the rest of the workflow.

As a single standard die, this model is a practical choice for reloaders who already know the exact bullet diameter they need and want a dedicated tool for that task. It suits careful cast-bullet preparation where repeatable sizing and smooth integration with established equipment matter more than unnecessary complexity.

About Lyman

The Lyman Gun Sight Company began in 1878 in Middlefield, Connecticut, and the brand developed around practical shooting equipment built for regular field and bench use. 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 has made the company a familiar name among handloaders as well as shooters who use traditional sighting systems.

The company expanded its reloading presence when Lyman acquired the Ideal reloading-tool business in 1925. Today, Lyman Products is headquartered in Middletown, Connecticut, and the brand remains closely associated with tools for bullet casting, case preparation, and general reloading work. That background is directly relevant to products such as H&I sizing dies, which reflect Lyman’s long-standing emphasis on practical bench equipment for shooters who want control over their ammunition components.

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: 6.55 mm
• Bullet diameter: 258.00 inch

Warranty

2 years. The Lyman H&i Sizing Die .258 is covered by a two-year warranty.