Brownells Barrel Liner Drill, Piloted, .22 Rimfire, .315'' (8Mm)

The Brownells Barrel Liner Drill in .22 rimfire is a specialized gunsmithing tool designed for gunsmiths and serious hobby builders who want to perform their own barrel work. This piloted deep-hole drill follows the original bore precisely, letting you maintain concentricity when you're boring out a rimfire barrel for a liner installation. If you're comfortable with silver soldering or brazing your own extension onto the drill, this tool offers a cost-effective path to custom barrel work without the premium price of a complete ready-to-use system.

Built with deep-hole flute geometry and a special helix angle engineered to prevent jamming during the drilling process, the Brownells drill handles the demands of cutting through hardened steel consistently. The reinforced web maintains accurate hole dimensions throughout the cut, which is critical when you're establishing the bore for a precision liner. Nitrided lands keep the cutting edges sharp across multiple jobs, so you're not burning through drills on every project.

This is the right tool if you're already set up for the machine work and soldering side of barrel liner installation. It's not a quick fix—it requires real skill and proper equipment—but for the builder who knows what they're doing, it cuts material cost and gives you full control over the process from start to finish.

Specifications

Frequently Asked Questions

Do I need to solder or braze an extension to this drill?

Yes. This is a standard-length deep-hole drill without an extension pre-attached. If you have the ability to silver solder or braze and want to save money versus a complete assembled drill, this core tool lets you do that work yourself.

What does "piloted" mean on a barrel liner drill?

The piloted design follows the original bore of the barrel, helping you maintain concentricity (alignment) during the drilling process. This is essential for accurate liner installation.

Will this drill jam up during use?

The deep-hole flute geometry and special helix angle are specifically designed to prevent jamming, a common problem in deep-hole drilling work.

Can I reuse this drill for multiple projects?

Yes. The nitrided lands on the cutting surfaces resist wear, so the drill maintains its sharpness across multiple jobs, extending the tool's working life compared to standard drills.