Lyman Top Punch 420

• Bullet-Nose Matched Profile: The Lyman Top Punch 420 is machined to match the bullet nose shape, so pressure is applied evenly during sizing and lubrication. That helps prevent nose deformation and keeps cast bullets closer to their intended profile.
• Built for Lube/Sizing Work: Designed for Lyman lube/sizing equipment, this top punch supports smooth, repeatable bullet handling during case preparation and bullet-casting workflows, reducing setup compromise at the bench.
• Steel Construction: The steel body gives the punch the rigidity needed for repeated shop use. In practice, that means stable alignment and dependable contact with the bullet during sizing operations.
• Made in USA: USA manufacture is relevant for reloaders who want established production standards and easier continuity when adding matching tools and accessories to an existing Lyman setup.
• RCBS Interchangeability: This pattern is noted as interchangeable with RCBS, which makes it easier to integrate into a mixed reloading bench and replace or expand tooling without changing the whole system.

About the Lyman Accessories Series

Lyman Accessories covers the supporting tools that keep a reloading or bullet-casting bench working efficiently. Rather than focusing on one press or one die set, the series includes the small but essential components that make core operations more precise, repeatable and easier to manage over long loading sessions. In practical terms, that means parts designed to fit established Lyman systems for case preparation, casting and bullet finishing.

Within that broader range, Lyman’s accessory approach is straightforward: durable materials, compatibility with established bench equipment and shapes or dimensions chosen for a specific task rather than a one-size-fits-all compromise. For cast-bullet users, that matters because bullet handling tools have a direct effect on consistency. A correctly matched accessory helps preserve bullet shape, maintain alignment in the press and reduce avoidable damage during sizing and lubrication. The result is a product family aimed at reloaders who value repeatable bench work, practical compatibility and tools that support the mechanical side of accurate ammunition preparation.

About the Lyman Top Punch 420

The Lyman Top Punch 420 is a dedicated bullet-sizing accessory made for use with Lyman lube/sizing equipment. Its role is simple but important: it contacts the bullet at the nose during the sizing process, and because the punch is shaped for that job, it helps the bullet enter the die with more even support. That is especially useful for cast bullets, where preserving the nose profile matters for both appearance and consistency.

The practical advantage of a model-specific top punch is that it reduces the chance of flattening, marking or otherwise distorting the bullet nose under pressure. With a generic contact surface, force can be applied unevenly; with the Top Punch 420, the fit is intended to follow the bullet’s contour more closely. For reloaders working through batches of cast bullets, that means more uniform handling from one piece to the next and less corrective sorting after sizing.

Steel construction suits the repeated contact and bench use expected from this kind of tool, while the compact format makes it easy to swap as bullet designs change. Because it is part of Lyman’s established lube/sizer system and is also noted as interchangeable with RCBS, it fits naturally into traditional cast-bullet workflows where compatibility and repeatability matter more than unnecessary complexity.

About Lyman

The Lyman Gun Sight Company began in 1878 in Middlefield, Connecticut, and the brand has long been associated with practical equipment for shooters and reloaders. Lyman Products is headquartered in Middletown, Connecticut, and its catalog focuses on tools and accessories for shooting and ammunition preparation rather than general outdoor gear.

The company makes equipment and accessories for shooting and reloading, with product lines that include reloading dies, presses, bullet-casting equipment and gun sights. That background is especially relevant here because cast-bullet and reloading tools remain a core part of the brand’s identity. Lyman also acquired the Ideal reloading-tool business in 1925, a detail that helps explain its long-standing presence in the handloading category and its continued emphasis on traditional bench equipment.

Main Features

• Manufacturer: Lyman
• Series: Lyman Accessories
• Category: Bullet Sizing
• Accessory Type: Top Punch 420
• Made in: USA
• Material: Steel
• Accessories for: Case preparation
• Weight: 145.00 g
• Color: Silver

Warranty

Lyman provides a 2-year warranty for this product. That stated period gives added reassurance for a bench tool intended for regular reloading and bullet-sizing use.

In the Box

• Lyman Top Punch 420