Lyman H&i Sizing Die .429

• .429 sizing diameter: This H&I sizing die is made for cast bullets that need to be brought to .429, helping maintain consistent bullet fit for reliable accuracy and cleaner performance with properly sized projectiles.
• Body sizing operation: The die is built to size the bullet body uniformly, which helps keep bullets cylindrical and consistent from one piece to the next during cast-bullet loading.
• Steel construction: A steel sizing die stands up well to repeated use on the loading bench and gives the reloader a durable tool for regular cast-bullet work.
• Tapered-mouth H&I design: Lyman’s H&I sizing dies use a tapered mouth to guide the bullet into the die more smoothly, supporting better alignment during sizing.
• Made for standard equipment: With standard 7/8"-14 thread compatibility, this die fits common presses and integrates easily into an established reloading setup.

About the H&I Series

Lyman H&I sizing dies are part of the company’s long-established cast-bullet reloading and bullet-casting range. They are intended for reloaders who cast their own bullets and want a practical way to bring bullet diameter to a controlled final size before loading. Within Lyman’s lineup, the H&I series sits alongside the brand’s lubricating and sizing equipment, especially the 4500 Lube Sizer, and focuses on one of the key variables in cast-bullet performance: proper bullet fit.

The series is built around a simple, durable steel die format that works with Lyman lubricating and sizing systems. Lyman describes these dies as having 90° hole spacing for easier bullet lubrication with hard lubricants, along with a tapered mouth and hardened interior to support alignment and maintain bullet shape during sizing. In practical use, that means the H&I series is aimed at reloaders who want repeatable bullet dimensions, dependable handling on the bench, and compatibility across a wide range of popular rifle and pistol cast-bullet diameters.

About the Lyman H&i Sizing Die .429

The Lyman H&i Sizing Die .429 is a dedicated cast-bullet sizing die for reloaders who need bullets finished to .429. That makes it a useful choice for handgun and rifle cast-bullet applications where final bullet diameter has a direct effect on chamber fit, leading characteristics, and downrange consistency. By bringing bullets to a controlled final size, this die helps support more uniform ammunition assembly and more predictable results on target.

Its body sizing function is straightforward and well suited to bench work where consistency matters more than speed alone. The steel construction gives the die the durability expected from a shop tool that may see repeated use over long loading sessions. Lyman’s H&I pattern also uses a tapered mouth, which helps start the bullet into the die with better alignment, reducing the chance of uneven entry and helping preserve a proper cylindrical form.

For reloaders already using standard equipment, the 7/8"-14 thread format makes integration simple. As a single standard die, it fits neatly into a focused cast-bullet workflow, whether the goal is maintaining a preferred bullet diameter for established loads or refining bullet fit as part of load development. The result is a practical reloading tool built for repeatable sizing rather than broad multi-purpose use.

About Lyman

The Lyman Gun Sight Company began in 1878 in Middlefield, Connecticut, and the brand remains closely associated with practical shooting and reloading equipment. Today, Lyman Products is headquartered in Middletown, Connecticut and concentrates on tools and accessories for shooters and reloaders rather than firearms themselves. Its range includes reloading dies, presses, bullet-casting equipment, and gun sights, which makes the company especially relevant to handloaders who want one brand that covers much of the loading bench.

Lyman also has deep roots in classic sight design and long-running reloading development. Lyman acquired the Ideal reloading-tool business in 1925, a step that strengthened its position in handloading equipment. That background helps explain why Lyman remains well known for traditional bench tools as well as cast-bullet equipment such as sizing dies and lubricating systems.

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 (mm): 10.90 mm
• Bullet diameter (inch): 429.00 inch

Warranty

Lyman provides a 2-year warranty for this product. That stated warranty period gives the buyer a clear, defined term of manufacturer coverage.