Forster Inside/Outside Deburring Tool .17 to .45 cal

The Forster Inside/Outside Deburring Tool is a workhorse for reloaders serious about case prep. Fresh brass—whether factory or once-fired—comes with dents, surface irregularities, and burrs at the case mouth that can sabotage seating consistency and bullet runout. This double-ended tool handles cartridge cases from .17 to .45 caliber, making it a practical addition to any reloading bench that processes mixed caliber lots. The design lets you work by hand, set it up in a lathe for volume work, or mount it to the optional Forster DBT Base for a more controlled setup.

One end features a pointed tip for chamfering the inside of the case mouth—the critical step before accurate bullet seating. The opposite end is an open ring that slides over the case mouth to deburr and true the exterior. Both cutting edges are precision-ground and hardened to make quick work of the burrs and sharp corners that trimming always leaves behind. The multi-caliber span means you're not buying separate tools for each cartridge family, and the hand-tool versatility keeps you flexible whether you're prepping fifty cases or five hundred.

Case mouth prep directly affects bullet seating quality, runout, and consistent velocity. Skipping this step or rushing it with dull tools wastes the precision work you've done on sorting, weighing, and measuring everything else. This Forster tool brings that level of attention to the finish line.

Key Features

• Double-ended design: inside chamfering tip and outside deburring ring in one tool
• Covers .17 to .45 caliber—no need for multiple tools across your cartridge lineup
• Precision-ground and hardened cutting edges for clean, accurate deburring
• Hand-operable, lathe-compatible, and compatible with optional Forster DBT Base for benchtop mounting
• Removes case-mouth burrs and sharp edges from trimming in seconds

Specifications

Frequently Asked Questions

Will this deburring tool work with all my rifle and pistol calibers?

Yes. The Forster Inside/Outside Deburring Tool handles any cartridge case from .17 to .45 caliber, so it covers centerfire rifle rounds (from .17 Hornet through .45-70 and beyond) and all common pistol calibers.

Can I use this tool by hand, or do I need a special mount?

It's designed to work by hand. You can also use it in a lathe or attach it to the optional Forster DBT Base (sold separately) for a more fixed, benchtop setup if you prefer.

What's the difference between the pointed end and the open end?

The pointed end inserts into the case mouth to chamfer the inside—preparing it for bullet seating. The open ring end slides over the case mouth to remove exterior burrs and sharp edges left by case trimming.

Is this tool included with the Forster DBT Base?

No. The deburring tool and the DBT Base are sold separately. The tool can be used by hand alone, and the base is an optional upgrade for benchtop mounting.