Hornady 390750 Primer Reamer - Small, Silver, Multi-Caliber Steel Tool

The Hornady 390750 primer reamer is a small, multi-caliber steel tool built for reloaders who want clean, consistent primer pockets without the fuss of separate equipment. Whether you're processing once-fired brass or prepping new cases, this reamer handles the job across different calibers—a genuine time-saver when you're working through a pile of brass before your next range session or hunt.

Primer pocket prep is one of those tasks that separates sloppy reloading from dialed-in ammo. Crud, primer sealant, and debris left in the pocket can cause inconsistent firing and premature misfires. A quality reamer removes the buildup and reamers the pocket to factory spec, ensuring your primers seat properly every time. The silver finish on this steel tool resists corrosion through years of use, and the multi-caliber design means you're not buying a separate tool for each round you load.

This Hornady reamer fits the 8-32 thread standard, so it integrates with compatible Hornady case prep stations and equipment. If you're running a progressive setup or a dedicated prep bench, you can swap it in alongside other complementary tools without starting over. It's the kind of straightforward, no-nonsense accessory that professional reloaders and serious shooters depend on to keep quality consistent and downtime minimal.

Specifications

Frequently Asked Questions

What calibers does this primer reamer work with?

The Hornady 390750 is a multi-caliber reamer, designed to handle multiple cartridge sizes. For specific caliber compatibility, refer to the product specifications or consult Hornady's documentation for your reloading setup.

Is this reamer compatible with Hornady case prep equipment?

Yes. The reamer uses the 8-32 thread standard, which is compatible with Hornady case prep stations and other equipment that accepts 8-32 threaded tools.

What's the difference between a primer reamer and a pocket cleaner?

A primer reamer removes material from the primer pocket to ensure consistent depth and a clean seating surface for the primer. While related, reaming and cleaning are distinct functions; this tool is engineered specifically for reaming.

Can I use this reamer on a hand-crank press or does it require powered equipment?

The reamer is designed for use with equipment that accepts 8-32 threaded tools. Compatibility with hand-crank or powered setups depends on your specific reloading station; consult your equipment manual or Hornady for guidance on proper installation and use.