Hornady 390751 Large Primer Reamer, Multi-Caliber Steel, Silver

The Hornady 390751 Large Primer Reamer is a multi-caliber steel tool designed for reloaders who need reliable, consistent primer pocket prep. Whether you're working up loads for a single caliber or managing brass across multiple cartridges, this large primer reamer handles the job with the precision that matters when you're seating fresh primers. Built from durable steel with a silver finish, it's made to withstand repeated use at the reloading bench without losing its edge or fit.

Primer pocket reaming is one of those prep steps that directly affects primer seating consistency and overall cartridge quality. A properly reamed pocket ensures uniform primer depth, which translates to more reliable ignition and tighter velocity spreads—especially important if you're chasing accuracy for hunting or competition. The multi-caliber design means you're not buying separate tools for different loads; one reamer covers your large-primer cartridges across the board.

This is a straightforward, single-purpose tool—no motors or complicated setups required. It's compatible with standard reloading press accessories that use 8-32 thread, so it integrates into most existing bench setups. If you're already running a Hornady progressive or single-stage press, or if you use a case prep station, this reamer slots right in.

Specifications

Frequently Asked Questions

What calibers does this large primer reamer work with?

This is a multi-caliber reamer designed for large primer pockets. It covers all common rifle and pistol cartridges that use large primers—no need for separate reamers for different calibers.

Is this reamer compatible with my Hornady reloading press?

Yes. The 8-32 thread connection is standard across Hornady press accessories, so it will work with any Hornady press or case prep station that accepts 8-32 threaded tools.

Do I need special equipment to use this reamer?

No. This reamer is a hand tool that threads into any compatible 8-32 accessory mount. It does not require a motor or power tool—just your reloading press or prep station.