Lyman H&i Sizing Die .359

• Precise .359 sizing: Brings cast bullets to a consistent .359 diameter, which helps maintain uniform fit in the bore and supports more repeatable accuracy.
• Body sizing operation: Sizes the bullet body cleanly and consistently, making it a practical choice for reloaders who want dependable bullet dimensions before lubrication and loading.
• Hardened steel construction: The steel sizing die is built for repeated use and resists wear, helping it hold its dimensions over time for steady results at the bench.
• Tapered mouth design: The tapered entry helps guide bullets into the die more smoothly, improving alignment and reducing the chance of deforming cast projectiles during sizing.
• Improved lubrication hole spacing: Lyman’s 90° hole spacing supports easier bullet lubrication, which is especially useful when working with harder lubricants in a lube-sizer setup.

About the H&i Sizing Die 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 bullet diameter. Within Lyman’s lineup, these dies serve as dedicated tools for bringing cast bullets to a chosen final size while supporting the lubrication process in compatible lube-sizer equipment. That makes them especially relevant for handloaders tuning loads for revolvers, lever-action rifles, and other firearms where bullet fit can strongly influence accuracy and leading.

The series is built around a simple and durable concept: hardened steel sizing dies with a tapered mouth for smoother bullet entry and an interior made to maintain proper alignment. Lyman’s updated design also uses 90° hole spacing, which helps lubricant flow more effectively, including with harder lubes. Available across a wide range of diameters, the H&I series gives reloaders a practical way to match bullet size to caliber, alloy, and barrel characteristics without adding unnecessary complexity to the casting workflow.

About the Lyman H&i Sizing Die .359

The Lyman H&i Sizing Die .359 is intended for cast-bullet reloaders who need a finished bullet diameter of .359. In cast-bullet shooting, small changes in diameter can make a meaningful difference in chambering, bore fit, and downrange consistency, so a dedicated sizing die like this one is useful when building loads around a specific firearm or bullet design. It is particularly relevant for handgun and rifle applications that benefit from careful bullet-to-bore matching rather than a one-size-fits-all approach.

This model uses a body sizing operation and a steel construction that suits regular bench use. The hardened interior is designed to keep the bullet aligned as it passes through the die, helping preserve a proper cylindrical shape instead of distorting soft cast projectiles. The tapered mouth also matters in practice, because it starts the bullet into the die more smoothly and reduces the effort needed to keep the bullet straight during sizing.

As part of Lyman’s H&I system, this die also benefits from the improved 90° lubrication hole spacing, which helps distribute lubricant more effectively when used in a compatible lube-sizer. For reloaders working with harder bullet lubes, that detail can make the sizing and lubricating process more consistent. The result is a straightforward bullet-sizing tool made for repeatable diameter control, dependable fit, and efficient cast-bullet preparation.

About Lyman

The Lyman Gun Sight Company began in 1878 in Middlefield, Connecticut, and the brand has long been associated with practical shooting and reloading equipment. Over time, Lyman expanded beyond sights into a broader range of tools for handloaders and bullet casters, including dies, presses, and casting equipment. That background gives the company a strong connection to the kind of bench tools used by shooters who build and refine their own ammunition.

Today, Lyman Products is headquartered in Middletown, Connecticut and focuses on equipment and accessories for shooting and reloading. Its product range includes reloading dies, presses, bullet-casting equipment, and gun sights, reflecting a long-standing emphasis on tools that support both ammunition preparation and field use. The company’s continued presence in cast-bullet and reloading categories makes it a familiar name for reloaders who value established tooling systems and broad caliber support.

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: 9.12 mm
• Bullet diameter (inch): 359.00 inch

Warranty

Lyman states a 2-year warranty for this product. This warranty period matches the stated coverage for the sizing die and provides defined manufacturer support for defects in materials and workmanship.