Lyman H&i Sizing Die .266

• .266 sizing diameter: Sizes cast bullets to a consistent .266 diameter, helping maintain uniform fit in the bore for steadier accuracy and more predictable results on the range.
• Body sizing operation: This die is built specifically for bullet sizing rather than case work, making it a practical choice for reloaders who cast their own bullets and want precise control over finished bullet dimensions.
• Hardened steel construction: The steel sizing die stands up well to repeated use, giving reloaders a durable tool that keeps its shape and sizing consistency over time.
• Tapered-mouth H&I design: Lyman’s H&I sizing dies use a tapered mouth and hardened interior to help guide bullets into the die smoothly, supporting alignment and a more uniform cylindrical shape.
• Standard press compatibility: With a 7/8"-14 thread, the die fits standard reloading press setups, so it integrates easily into an established bullet-casting and reloading bench.

About the H&I Sizing Dies 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 final bullet diameter. In Lyman’s lineup, these dies sit alongside the brand’s lubricating and sizing equipment and are intended for use with cast bullets in both rifle and handgun applications. Their role is straightforward but important: bring bullets to a uniform finished diameter so they fit the intended bore correctly and perform more consistently.

The series is built around a practical workshop design. Lyman’s improved H&I dies feature 90° hole spacing to aid bullet lubrication, even when harder lubricants are used. A tapered mouth helps start the bullet into the die more smoothly, while the hardened interior supports alignment and helps maintain a true cylindrical shape during sizing. The range covers many popular bullet diameters, making the series useful for reloaders who work across several calibers and want a durable, repeatable sizing tool that fits naturally into a cast-bullet loading process.

About the Lyman H&i Sizing Die .266

The Lyman H&i Sizing Die .266 is a single body sizing die made for cast bullets that need to be brought to a finished diameter of .266 or 6.76 mm. For cast-bullet reloaders, correct bullet diameter is a key part of accuracy, bore fit and consistent downrange behavior. This die gives a straightforward way to size bullets uniformly, which is especially useful when working with bullets as-cast that may vary slightly from one batch to another.

Its steel construction is suited to repeated bench use, and the standard adjustment format keeps setup simple for reloaders already familiar with conventional die systems. The 7/8"-14 thread means it fits standard presses, so it can be integrated into an existing reloading setup without special adapters. As part of Lyman’s H&I system, it also benefits from the series design features that matter in practice: the tapered die mouth helps bullets enter with better alignment, while the hardened interior supports a more even finished shape. For shooters loading cast bullets for accuracy work, general range use or load development, this die serves as a dedicated sizing tool that helps make bullet dimensions more uniform from round to round.

About Lyman

The Lyman Gun Sight Company began in 1878 in Middlefield, Connecticut, establishing a long presence in the American shooting industry. Today, Lyman Products is headquartered in Middletown, Connecticut and is known for making equipment and accessories for shooting and reloading. Its range includes reloading dies, presses, bullet-casting equipment and gun sights, which makes the brand especially relevant to reloaders who want tools from a manufacturer with experience across the full loading process.

Lyman’s history also includes important expansion in reloading equipment. Lyman acquired the Ideal reloading-tool business in 1925, strengthening its position in handloading, and Mark 7 Reloading became a Lyman brand in 2019. That background helps explain why Lyman remains closely associated with practical, workshop-focused tools for bullet casting, sizing and ammunition preparation.

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
• Adjustment: Standard
• Press compatibility: Standard 7/8"-14 thread
• Bullet diameter: 6.76 mm
• Bullet diameter: 266.00 inch

Warranty

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