Hornady Trimmer Pilot #10 .312

• Caliber-specific case guidance: The #10 pilot is sized for .312 / 7.92 mm bullet diameter applications, helping center the case mouth during trimming for straighter, more consistent case preparation.
• Cam Lock Trimmer compatibility: This pilot is made for the Hornady Cam Lock Trimmer, giving reloaders a simple way to match the trimmer to the cartridge family they are working with.
• Steel construction: The steel body stands up to repeated contact with brass cases, which matters when trimming larger batches and trying to maintain consistent fit over time.
• Cleaner, more repeatable trimming: By supporting the case mouth correctly, the pilot helps reduce wobble at the cutter, which contributes to more uniform case length and smoother follow-up chamfering and deburring.
• Useful addition to a case-prep setup: For reloaders who work across several calibers, adding the correct pilot keeps the trimmer properly configured and avoids compromise when switching between cartridge sizes.

About the Trimmer Pilot Series

Hornady Trimmer Pilots are part of the company’s case-preparation range for reloaders who want a trimmer matched to the cartridge they are processing. Within Hornady’s reloading lineup, these pilots sit alongside the Cam Lock Trimmer and related case-care tools, forming a simple caliber-specific system rather than a one-size-fits-all approach. That matters in practice because the pilot helps guide the case mouth during trimming, supporting better alignment and more repeatable results.

The series is intended for handloaders who process brass for rifle or handgun cartridges and want dependable case-length control as part of a broader reloading routine. The design philosophy is straightforward: use an interchangeable pilot sized to the bullet diameter so the trimmer can be adapted to different cartridge families without changing the core tool. In use, that makes the system practical for reloaders who maintain several calibers and want to keep setup changes simple while preserving trimming consistency. Interchangeable fit, caliber-specific sizing and a focus on repeatable case preparation define the series.

About the Hornady Trimmer Pilot #10 .312

The Hornady Trimmer Pilot #10 .312 is a caliber-specific case-preparation accessory built for reloaders using cartridges with a .312 inch / 7.92 mm bullet diameter. Its role is simple but important: it supports the case mouth inside the trimmer so the brass stays properly centered while material is removed. That guidance helps the cutter work more evenly, which is useful when the goal is consistent case length across a batch of brass.

As part of the Hornady Cam Lock Trimmer system, this pilot gives the trimmer the correct internal reference for the cartridge size being processed. In practical terms, that means less compromise than trying to use a near match, especially for reloaders who pay close attention to uniform neck preparation before seating bullets. Better centering at the trimming stage also helps later steps such as chamfering and deburring feel more consistent.

The steel construction suits repeated workshop use and fits the purpose of a small but frequently handled reloading accessory. For anyone building a complete caliber-specific case-prep setup, the #10 pilot is the part that lets the trimmer work as intended with .312-caliber brass. It is a specialized component, but one that directly supports cleaner trimming workflow and more repeatable handloading results.

About Hornady

Hornady Manufacturing was founded by Joyce Hornady in 1949 in Grand Island, Nebraska. The company remains family-owned and is known for producing bullets, ammunition, reloading tools and related accessories. That broad involvement in shooting and reloading equipment is especially relevant here, because Hornady’s case-preparation tools are part of a larger system built for handloaders who want compatible components across the bench.

Hornady expanded its tooling expertise when it acquired Pacific Tool Company in 1971, strengthening its position in reloading equipment. Its reloading range includes presses, dies, powder measures, scales and case-preparation tools, and the company is also known for the Lock-N-Load bushing system for faster die changes. In practical terms, Hornady’s reputation in this category comes from designing tools that fit into a coherent reloading workflow rather than as isolated accessories.

Main Features

• Product type: Case Trimmer Pilot
• Manufacturer: Hornady
• Made in: USA
• Material: Steel
• Intended use: Case preparation
• Bullet diameter (mm): 7.92 mm
• Bullet diameter (inch): 312.00 inch
• Compatibility: Hornady Cam Lock Trimmer

Warranty

Hornady provides a 2-year warranty for this product. A stated multi-year warranty is useful for workshop tools and accessories that see regular use as part of a reloading setup.