Hornady 284 Winchester Full Length Sizing Die

The Hornady 284 Winchester Full Length Sizing Die is the workhorse of precision reloading for shooters who demand consistency and durability. Built from select, heat-treated steel, this die is engineered to handle the repeated compression and decapping cycles that come with serious handloading—whether you're preparing match ammunition, hunting rounds, or volume loads for the range. Hornady backs every die with a lifetime guarantee against wear or breakage under normal use, so you're investing in a tool that will outlast your reloading bench.

What sets this die apart is the Zip Spindle system, a precision collet mechanism that holds the decap spindle with just enough grip to allow easy adjustment while keeping it perfectly centered in the die body. The hardened steel decap pins are robust enough to handle even crimped military brass without hesitation. The expander ball is engineered with a smooth, threaded design that's slightly elliptical in shape—this geometry minimizes case neck stretching and prevents the expander from loosening over time, a common frustration with inferior designs.

The die ships ready to work, with Hornady's double-flat lock rings already installed so you can thread it into your press immediately. You'll also get the custom plastic storage box, which keeps your die protected and organized in your reloading station. Whether you're necking up cases or sizing fired brass, this full length die delivers the precision and reliability that serious reloaders expect from Hornady.

Key Features

• Zip Spindle collet system for easy decap pin adjustment and centering
• Hardened steel decap pins capable of handling crimped military cases
• Elliptical, long-smooth expander ball reduces case neck stretching
• Double-flat lock rings pre-installed for immediate setup
• Lifetime durability guarantee under normal reloading use
• Designed for necking up cases without requiring a separate expander
• Includes protective plastic storage box

Specifications

Frequently Asked Questions

Will this die handle crimped military brass?

Yes. The Hornady 284 Winchester Full Length Sizing Die uses hardened steel decap pins specifically designed to remove primers from crimped military cases without damage or failure.

Do I need a separate expander die to neck up cases?

No. The elliptical expander ball in this full length die can handle necking up cases on its own, so you won't need to purchase an additional die for that operation.

What comes in the box?

The die arrives with the double-flat lock rings already installed and ready to thread into your press, plus a custom plastic storage box for safekeeping and organization.

Is this die guaranteed?

Yes. Hornady guarantees this die will not wear out or break under normal reloading use for life.