Lyman H&i Sizing Die .358

• .358 sizing diameter: This H&I die sizes cast bullets to .358 inch, helping maintain the bullet fit needed for consistent bore engagement and dependable cast-bullet accuracy.
• Body sizing operation: The die is built for bullet sizing rather than cartridge case work, making it a practical choice for reloaders who cast their own bullets and want a dedicated tool for final bullet preparation.
• Hardened steel construction: A steel sizing die stands up to repeated use and helps preserve uniform internal dimensions, which supports repeatable bullet shape from batch to batch.
• Tapered, alignment-focused design: Lyman H&I sizing dies use a tapered mouth and hardened interior to guide bullets into the die more smoothly and help keep them cylindrical during sizing.
• Standard 7/8"-14 compatibility: The standard thread pattern fits common presses, so the die integrates easily into established reloading setups without requiring a proprietary mounting system.

About the H&I 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, especially the 4500 Lube Sizer, and are intended for reloaders working with cast handgun and rifle bullets rather than jacketed projectile loading alone.

The defining idea behind the series is straightforward: proper bullet diameter is critical to cast-bullet performance. Lyman builds these dies with a tapered mouth and a hardened interior to support alignment as the bullet enters the die and to help maintain a consistent cylindrical form during sizing. The improved design also uses 90° hole spacing to make bullet lubrication easier, including with harder modern lubricants. Because the series covers many popular diameters, H&I dies give handloaders a practical way to match bullet size to caliber, barrel characteristics and intended load use while keeping the process simple and repeatable.

About the Lyman H&i Sizing Die .358

The Lyman H&i Sizing Die .358 is a dedicated bullet-sizing tool for cast-bullet reloaders who need a .358 inch finished diameter. That size is commonly chosen for a range of .35-caliber handgun and rifle applications, where correct bullet fit plays a major role in accuracy, clean shooting and consistent downrange behavior. By bringing bullets to a uniform final diameter, this die helps reduce variation from one projectile to the next and supports more predictable loading results.

As a body sizing die, this model is intended specifically for bullet preparation rather than cartridge case sizing. Its steel construction suits repeated workshop use, while the standard adjustment format keeps setup familiar for reloaders already using conventional press-mounted tooling. The standard 7/8"-14 thread also makes integration easy on common presses, so it fits naturally into an established casting and loading bench.

In practical use, the die’s value is not just the nominal diameter but the way it contributes to a more uniform bullet. A correctly sized cast bullet can seat and travel more consistently, and it can be better matched to the firearm’s bore and the reloader’s chosen alloy and lubricant combination. For shooters using Lyman lubricating and sizing equipment, this H&I die is a straightforward component that supports repeatable cast-bullet preparation without adding unnecessary complexity.

About Lyman

The Lyman Gun Sight Company began in 1878 in Middlefield, Connecticut, and the brand remains closely associated with practical equipment for shooters and reloaders. Lyman Products is headquartered in Middletown, Connecticut, and its core business centers on tools and accessories for reloading and shooting. The company’s range includes reloading dies, presses, bullet-casting equipment and gun sights, which makes it especially relevant to handloaders building complete bench setups around one brand’s tooling philosophy.

Lyman also has a long connection to traditional sight design, and its tang and receiver sights continue to reflect principles from William Lyman’s original sight design. Over time, the company expanded its reloading presence further, including the 1925 acquisition of the Ideal reloading-tool business. That history helps explain why Lyman remains a familiar name in cast-bullet and reloading equipment, where durable workshop tools and established loading practices still matter.

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: 9.09 mm
• Bullet diameter (inch): 358.00 inch

Warranty

2 years. The Lyman H&i Sizing Die .358 is covered by a 2-year warranty.