Hornady 390550 Universal Shell Holder #10, Multi-Caliber Steel, Silver

The Hornady Universal Shell Holder #10 is a precision-machined steel reloading accessory designed to secure cartridges during the reloading process. This multi-caliber shell holder accepts a wide range of ammunition types—including .380 ACP, .221 Remington Fireball, 6mm TCU, .222 Remington Magnum, 7x47mm Helm, .20 Tactical, .204 Ruger, and others—making it a versatile choice for reloaders working with multiple calibers. Whether you're setting up a single-stage press or managing a progressive reloading bench, a properly sized shell holder is essential for consistent case positioning and safe, accurate rounds downrange.

Built from solid steel and heat-treated for durability, this shell holder is engineered to work reliably with Hornady's full lineup of reloading tools, including the Handheld Priming Tool and Cam-Lock Case Trimmer. Beyond the Hornady ecosystem, the #10 is designed to fit most popular press brands on the market, giving you flexibility if you ever upgrade or add equipment to your reloading setup.

Shell holders are often overlooked, but they're one of those foundational components that directly impact the quality and consistency of your handloads. A worn or undersized holder can lead to loose case seating, variable primer pocket engagement, and ultimately inferior ammunition. The Hornady #10's solid construction and wide caliber compatibility make it a reliable workhorse for serious reloaders.

Key Features

• Accepts .380 ACP, .221 Remington Fireball, 6mm TCU, .222 Remington Magnum, 7x47mm Helm, .20 Tactical, .204 Ruger, and other compatible calibers
• Precision-machined solid steel construction for durability and accuracy
• Heat-treated for extended service life under repeated use
• Compatible with Hornady reloading tools including Handheld Priming Tool and Cam-Lock Case Trimmer
• Fits most popular press brands on the market

Specifications

Frequently Asked Questions

What calibers does Hornady Shell Holder #10 work with?

The #10 is compatible with .380 ACP, .221 Remington Fireball, 6mm TCU, .222 Remington Magnum, 7x47mm Helm, .20 Tactical, .204 Ruger, and other cartridges in that size range. If you're unsure whether your specific caliber fits, check your press manual or contact Hornady directly for a complete compatibility list.

Will this shell holder work with my reloading press?

Yes. The Hornady #10 is designed to fit all Hornady reloading equipment and is also manufactured to be compatible with most other press brands on the market. Verify your press's shell holder mount before ordering to ensure compatibility.

Is this shell holder compatible with Hornady's priming tools?

Yes. The #10 is designed to work with Hornady's Handheld Priming Tool and Cam-Lock Case Trimmer, as well as the full range of Hornady reloading accessories.

What's the difference between shell holder sizes?

Shell holders come in various sizes (#1–#14 and beyond) to accommodate different cartridge head sizes. The #10 is sized for small to medium rifle and pistol cartridges like those listed above. Using the correct size ensures secure case seating and consistent reloading results.