Lyman H&I Bullet Sizing Die .358"

The Lyman H&I Bullet Sizing Die in .358" is a precision tool for handloaders who cast their own bullets and need to size them to exact specifications. This sizing die handles the critical step of bringing cast bullets to uniform diameter—essential for consistent accuracy and reliable feeding in your rifle. Whether you're casting .358 Winchester, .358 Norma Magnum, or any other cartridge in that bore diameter, this die ensures every projectile meets your chamber and magazine standards.

Built with a hardened interior and a tapered mouth, the die keeps bullets properly aligned during sizing, producing cylindrical results that feed reliably and shoot true. The 90-degree hole spacing in the design reflects Lyman's longstanding commitment to quality casting and reloading equipment. If you already run RCBS equipment, this die is interchangeable with those systems, giving you flexibility in how you set up your casting bench.

Casting your own bullets lets you fine-tune your loads, reduce per-round cost on high-volume shooting, and dial in performance for hunting or range work. A .358" sizing die is the bridge between the casting pot and the loading press—and this one is built to last and perform.

Key Features

• Hardened interior for durability through hundreds of sizing cycles
• Tapered mouth design ensures proper bullet alignment and cylindrical shape
• 90-degree hole spacing for improved die geometry
• Interchangeable with RCBS equipment
• .358" diameter for standard rifle bore sizing

Specifications

Frequently Asked Questions

What calibers does the .358" sizing die work for?

This die is sized for any cartridge that uses a .358" diameter bullet, including .358 Winchester, .358 Norma Magnum, and similar calibers. If you're unsure of your bullet diameter, check your casting molds or ammunition specs.

Can I use this die with my RCBS casting equipment?

Yes. The Lyman H&I Bullet Sizing Die is interchangeable with RCBS systems, so it will work with your existing RCBS casting setup.

Do I need a sizing die if I'm casting bullets?

If you cast bullets, sizing is important to ensure uniform diameter for reliable feeding and accuracy. Cast bullets can vary slightly in diameter; the sizing die brings them all to specification.