Lyman H&i Sizing Die .380

• Body Sizing Function: Sizes cast bullets to a consistent final diameter, which helps improve fit in the bore and supports more uniform accuracy.
• Hardened Steel Construction: The steel sizing surface resists wear over long use, so the die maintains its dimensions through repeated bullet-sizing sessions.
• 90° Hole Spacing: Lyman’s improved H&I design spaces the lubrication holes at 90°, making it easier to apply lubricant evenly, including with harder bullet lubes.
• Tapered Mouth Design: The tapered entry helps guide bullets into the die more smoothly, improving alignment and helping preserve a true cylindrical shape.
• Standard 7/8"-14 Compatibility: Fits presses with the common 7/8"-14 thread, making it easy to integrate into an established bullet-casting or reloading setup.

About the Series

Lyman H&I Sizing Dies are part of the company’s long-established bullet-casting and cast-bullet loading range. Built for reloaders who cast their own bullets, the series is designed to perform one of the most important finishing steps in cast-bullet preparation: bringing bullets to the correct final diameter while working with a lubricator/sizer system. In Lyman’s lineup, these dies sit alongside moulds, lube-sizers and other casting tools that support a complete cast-bullet workflow.

The defining characteristics of the series are its hardened interior, tapered mouth and 90° lubrication-hole spacing. Together, these features help bullets enter the die in line, pass through smoothly and receive lubricant more evenly. That matters in practice because cast-bullet performance depends heavily on proper bullet fit, consistent shape and reliable lubrication. The H&I range covers many popular rifle and pistol diameters, giving handloaders a straightforward way to match bullet size to caliber and barrel requirements. The result is a simple, durable tool family aimed at reloaders who value repeatable bullet preparation rather than unnecessary complexity.

About the Lyman H&i Sizing Die .380

The Lyman H&i Sizing Die .380 is a single standard steel sizing die made for cast bullets that need to be brought to a .380 diameter. In practical terms, this is the step that helps turn an as-cast bullet into a finished projectile with more consistent dimensions, better bore fit and more predictable downrange behavior. For cast-bullet shooters, that consistency is central to maintaining accuracy and reducing the problems that can come from bullets that are oversized, undersized or unevenly shaped.

This model uses Lyman’s improved H&I die pattern, including a tapered mouth for easier bullet entry and a hardened interior that supports long service life. The 90° hole spacing is especially useful when working with harder lubricants, because it helps the lube flow into the bullet grooves more evenly during the sizing process. That makes the die well suited to reloaders who want a cleaner, more controlled finishing step when preparing cast bullets for handgun or rifle use, depending on the bullet design being sized.

Its standard 7/8"-14 thread keeps installation straightforward on compatible presses, and the universal case-type format reflects its role as a dedicated bullet-sizing tool rather than a cartridge-specific loading die. For reloaders building a cast-bullet setup around proven, conventional tooling, this die offers a focused solution: durable construction, repeatable sizing and compatibility with established Lyman bullet-casting equipment.

About Lyman

The Lyman Gun Sight Company began in 1878 in Middlefield, Connecticut, and it developed from a firearms sight maker into a broader supplier of shooting and reloading equipment. Over time, the company expanded well beyond sights, and its product lines now include reloading dies, presses, bullet-casting equipment and gun sights. That long involvement in both shooting accessories and handloading tools gives Lyman a particularly strong connection to products used at the loading bench as well as on the firearm itself.

Lyman acquired the Ideal reloading-tool business in 1925, a step that strengthened its place in the reloading market. The company’s sight-making heritage also remains visible, as its tang and receiver sights still follow principles from William Lyman’s original design work. Today, Lyman Products is headquartered in Middletown, Connecticut and continues to make equipment and accessories for shooting and reloading, with a catalog that spans traditional handloading tools, casting gear and related workshop equipment.

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: 9.63 mm
• Bullet diameter: 380.00 inch

Warranty

Lyman provides a 2-year warranty for this product. This stated warranty period covers defects in materials and workmanship under normal use.