Lyman H&i Sizing Die .311

• .311 sizing diameter: Brings cast bullets to a consistent .311 size, which helps improve fit in suitable bores and supports more uniform accuracy.
• Body sizing design: Sizes the bullet body cleanly and consistently, making it a practical choice for reloaders who want repeatable bullet dimensions during cast-bullet preparation.
• Hardened steel construction: The steel die is built for long service life and resists wear from repeated use, which matters when processing larger batches of bullets.
• Tapered mouth and hardened interior: This design helps guide bullets into the die and maintain cylindrical shape, supporting smoother operation and more consistent finished bullets.
• Standard compatibility: Made for standard 7/8"-14 thread equipment, it fits common reloading setups without requiring a specialized press arrangement.

About the H&i Series

Lyman H&I sizing dies are part of the company’s cast-bullet tooling range, intended for reloaders who want to size and lubricate bullets with repeatable results. In Lyman’s lineup, these dies sit within the brand’s long-established bullet-casting and reloading equipment family, where the focus is on practical tools for handloaders rather than complex adjustment systems. The series is built around the idea that proper bullet diameter is central to cast-bullet accuracy, so each die is made to bring bullets to a defined finished size for common rifle and pistol applications.

A distinguishing feature of the series is its 90° hole spacing, which is designed to make bullet lubrication easier, including with harder modern lubricants. Lyman also uses a tapered mouth and a hardened interior to help align the bullet as it enters the die and preserve a true cylindrical shape through the sizing process. Because these dies are offered across a wide range of diameters, the H&I series suits reloaders who tailor cast bullets to specific calibers, barrel dimensions, and intended loads.

About the Lyman H&i Sizing Die .311

The Lyman H&i Sizing Die .311 is a single body sizing die made for cast-bullet reloaders who need a consistent .311 finished diameter. That makes it especially relevant for cartridges and rifles that perform best with bullets in this size range, where correct bullet fit can have a direct effect on accuracy, leading, and overall shooting consistency. Rather than being a general-purpose die set, this model is a dedicated sizing tool for reloaders who already know the diameter they need and want a straightforward way to produce uniform bullets.

Its steel construction gives the die the durability needed for repeated bench use, while the standard adjustment format keeps setup simple for reloaders using conventional equipment. The die is made for standard 7/8"-14 thread compatibility, so it integrates easily into common press setups without special adapters. In practice, that means it suits established handloading benches as well as shooters expanding into cast-bullet loading.

Lyman’s H&I design also adds practical benefits during operation. The tapered mouth helps start bullets into the die more smoothly, and the hardened interior supports alignment as the bullet is sized. This helps maintain a more uniform cylindrical form instead of simply forcing the bullet through a restrictive opening. For reloaders working with cast bullets, that combination of controlled sizing, durable construction, and straightforward press compatibility makes this die a useful tool for producing consistent ammunition components.

About Lyman

The Lyman Gun Sight Company began in 1878 in Middlefield, Connecticut. Over time, Lyman expanded from sight-making into a broader shooting and reloading business, and today it is known for equipment and accessories used by handloaders and shooters. Its product range includes reloading dies, presses, bullet-casting equipment, and gun sights, which makes the brand especially relevant in categories where precision handloading tools and practical workshop durability matter.

Lyman later strengthened its reloading position by acquiring the Ideal reloading-tool business in 1925. The company is now headquartered in Middletown, Connecticut, and it remains closely associated with traditional reloading and cast-bullet equipment. That background gives Lyman a strong connection to products like sizing dies, where consistent dimensions, straightforward operation, and compatibility with established loading practices are more important than unnecessary complexity.

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: 7.90 mm
• Bullet diameter: 311.00 inch

Warranty

2 years. This Lyman sizing die is covered by a 2-year warranty, matching the stated warranty period for the product.