Lyman Shotgun Bullet Mould / Sabot Slug - 20 Ga. Hollow Base

The Lyman Shotgun Bullet Mould for 20 Ga. Hollow Base slugs gives reloaders a precision-built casting tool designed specifically for producing Foster-style shotgun slugs at home. Built from solid leaded steel and heat-treated for durability, this mould delivers the consistent results you need to handload reliable, accurate ammunition for your 20-gauge shotgun. Whether you're a dedicated reloader looking to stretch your budget or a shooter who wants control over your own ammunition, this mould produces hollow-base slugs that chamber cleanly and perform without requiring any special rifling in your barrel.

Lyman engineered this mould for both precision and longevity. The solid steel construction is machined to a fine finish, and hardened steel alignment pins keep everything locked in place during repeated casting cycles. The sprue plate is ground flat and held secure by tempered steel spring washers and screws, so you get consistent casting sessions without the wear and tear that can plague lower-quality moulds. Because Lyman uses steel instead of iron, break-in time is significantly shorter—you'll be casting quality slugs faster than you would with traditional iron moulds.

This is a straightforward, purpose-built tool for the handloader who wants reliable 20-gauge slugs without the complexity or cost of specialty projectiles. Use it with standard shotgun wads for consistent results, and you'll have a mould that delivers year after year of solid casting performance.

Key Features

• Solid leaded steel construction heat-treated for durability and long service life
• Hardened steel alignment pins ensure precise, repeatable casting
• Ground-flat sprue plate held secure with tempered steel hardware
• Produces Foster-style hollow-base slugs requiring no rifling
• Significantly faster break-in compared to iron moulds
• Designed for use with standard shotgun wads

Specifications

Frequently Asked Questions

What wads do I use with this Lyman 20 Ga. shotgun slug mould?

This mould is designed for use with standard shotgun wads. Check your reloading manual for the specific wad recommendations for your 20-gauge loads.

Will these hollow-base slugs work in any 20-gauge shotgun?

Yes. These Foster-style hollow-base slugs are designed to shoot in any 20-gauge shotgun and do not require rifling in the barrel. They'll chamber and function in smooth-bore and rifled shotguns alike.

How long does this mould take to break in?

Because Lyman uses solid steel construction instead of iron, the break-in period is significantly shorter than traditional iron moulds, so you can begin casting quality slugs more quickly.

What makes this Lyman mould different from cheaper moulds?

The solid leaded steel body is heat-treated, the alignment pins are hardened steel, and the sprue plate is ground flat and secured with tempered steel hardware. This precision engineering means more consistent casting, less maintenance, and years of reliable performance—details that matter when you're producing ammunition.