Lyman H&i Sizing Die .354

• .354 sizing diameter: Brings cast bullets to a consistent final diameter, which helps support uniform bore fit and more repeatable accuracy.
• Body sizing operation: Sizes the bullet body cleanly for use in lubricating and sizing workflows, making it a practical choice for cast-bullet reloaders.
• Steel construction: The steel die body stands up well to repeated use on the bench and maintains the dimensional stability needed for consistent results.
• Tapered mouth and hardened interior: These design features help guide bullets into the die more smoothly and support a true cylindrical shape during sizing.
• Standard 7/8"-14 thread compatibility: Fits common presses with a standard die thread, so it integrates easily into established reloading setups.

About the H&i Sizing Die Series

Lyman H&i Sizing Dies are part of the company’s long-established cast-bullet reloading range, intended for reloaders who want to size and lubricate bullets with consistent, repeatable results. In the Lyman lineup, this series sits within the brand’s bullet-casting and bullet-finishing equipment, complementing lubricator-sizers and related casting tools rather than conventional cartridge loading dies. The design focus is straightforward: produce a correctly sized bullet with reliable alignment and smooth passage through the die.

Across the series, hardened internal surfaces, a tapered die mouth, and 90° hole spacing are used to support easier lubrication and more uniform bullet shaping, including with harder bullet lubricants. The dies are made for reloaders who cast their own bullets and need a practical way to match bullet diameter to firearm requirements. That makes the H&i line especially relevant for shooters working with handgun and rifle cast loads where correct bullet fit plays a major role in accuracy, leading control, and dependable performance on the range.

About the Lyman H&i Sizing Die .354

The Lyman H&i Sizing Die .354 is a single body sizing die made for cast-bullet reloaders who need a precise final bullet diameter in a standard, durable format. Its .354 sizing dimension is the defining feature: it allows bullets to be brought to a controlled finished size that supports proper fit for the intended bore and loading application. In cast-bullet shooting, that consistency matters because bullet diameter has a direct effect on accuracy potential, lubrication performance, and how cleanly the bullet travels through the barrel.

This die uses a steel construction with a hardened interior to handle repeated sizing work while maintaining the dimensional consistency expected from a bench tool. The tapered mouth helps start bullets into the die with better alignment, reducing the chance of uneven entry and helping preserve a true cylindrical form. In practice, that means smoother operation and more uniform finished bullets, especially when processing batches.

Its standard 7/8"-14 thread makes it easy to install in common presses, so it fits naturally into established reloading setups without requiring a dedicated mounting format. As a single standard die with no bushing system, it keeps operation simple and direct. For reloaders focused on cast-bullet ammunition, this model is a practical tool for producing bullets with repeatable diameter and dependable preparation before loading.

About Lyman

The Lyman Gun Sight Company began in 1878 in Middlefield, Connecticut, and the brand has remained closely tied to shooting and reloading equipment ever since. Lyman Products is headquartered in Middletown, Connecticut, and its catalog covers a broad range of tools and accessories for shooters, with a strong emphasis on reloading equipment and bullet-casting gear. That long involvement in the category is one reason Lyman remains a familiar name among handloaders who want practical, workshop-oriented tools.

Over time, the company expanded beyond sights into a wider reloading portfolio, including reloading dies, presses, bullet-casting equipment, and gun sights. Lyman acquired the Ideal reloading-tool business in 1925, which helped strengthen its position in handloading. The company’s continued focus on tools for casting, sizing, measuring, and loading ammunition makes it especially relevant for products such as H&i sizing dies.

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
• Adjustment: Standard
• Press compatibility: Standard 7/8"-14 thread
• Bullet diameter: 8.99 mm
• Bullet diameter: 354.00 inch

Warranty

2 years. This Lyman sizing die is covered by a two-year warranty period.