Lyman Gas Checks .35/.38 spl/.357 cal - 1000/ct

If you're casting .35, .38 Special, or .357 Magnum bullets, a quality gas check is essential to protecting your cast projectiles and unlocking their full velocity potential. The Lyman Gas Checks for .35/.38 spl/.357 cal are gilded metal cups designed to seat at the base of your cast bullets, shielding them from the erosive effects of hot powder gases. This 1000-count box gives serious reloaders and bullet casters the supply they need for a full season of handloading without constant reordering.

Gas checks work by creating a protective barrier between your cast bullet base and the high-pressure gases in the chamber. Without them, cast bullets—especially softer alloys—can experience gas cutting and leading, which accelerates bore fouling and limits how hot you can push your loads. By seating a gas check on your bullets before sizing, you're essentially extending the usable velocity range of your cast ammunition and getting more consistent, cleaner performance downrange.

Lyman's crimp-on design makes seating straightforward during the sizing process—no special tools or complicated steps required. The cups are already sized for your specific caliber, so you simply position and set them as part of your normal reloading workflow. A thousand per box means you'll have reliable gas checks on hand whether you're loading for hunting, target practice, or steady range work with handguns.

Key Features

• Gilded metal construction protects cast bullets from hot powder gas erosion
• Enables higher velocity potential in cast bullet loads
• Crimp-on design integrates easily into standard sizing operations
• Caliber-specific fit ensures proper seating and performance
• 1000-count bulk quantity reduces frequent reordering

Specifications

Frequently Asked Questions

What calibers do these Lyman gas checks fit?

These gas checks are sized specifically for .35, .38 Special, and .357 Magnum bullets. Be sure to match the gas check caliber to your cast bullet diameter for proper fit and function.

How do I seat a gas check on a cast bullet?

The crimp-on design means you position the gas check over the base of your cast bullet during the sizing step of your reloading process. They seat as part of your normal bullet sizing operation without requiring additional specialized equipment.

Why would I use gas checks on cast bullets?

Gas checks protect cast bullets from erosion caused by hot powder gases, which helps prevent gas cutting and bore leading. They also allow you to load cast bullets to higher velocities than you could safely achieve without them, expanding the performance envelope of your handloads.

How many gas checks are in one box?

Each box contains 1000 gas checks, giving you a substantial supply for extended reloading sessions or an entire shooting season.