Hornady 300 Remington Ultra Magnum Match Grade Full Length Die

The Hornady 300 Remington Ultra Magnum Match Grade Full Length Die is built for reloaders who demand precision and consistency in their rifle ammunition. This full length die handles the complete sizing operation—body, shoulder, and neck—in a single press stroke, making it ideal for shooters preparing match-grade rounds or working with tough magnum brass that benefits from controlled, deliberate sizing rather than aggressive full-length work.

What sets this die apart is the interchangeable neck-sizing bushing system. Instead of guessing at neck tension or settling for generic sizing, you select a bushing matched to your bullet diameter and desired tension, then fine-tune with additional bushings available in .002-inch increments. This approach eliminates the common trap of over-sizing case necks, which work-hardens brass and shortens case life—a real concern with premium magnum brass. The self-centering design of both bushing and decap spindle keeps everything square and consistent, shot after shot.

The die incorporates the same rock-solid components found in Hornady's Custom Grade lineup: a self-centering decap spindle with o-ring tensioner, an elliptical expander ball, and a headed decap pin that handles 300 Ultra Mag with authority. Whether you're assembling precision hunting loads or maintaining a tight standard deviation for long-range work, this full-length die gives you the control to do it right.

Key Features

• Interchangeable neck-sizing bushings for customized bullet tension control
• Bushings available in .002-inch increments for fine-tuning
• Sizes case body, bumps shoulder, and sizes neck in one stroke
• Self-centering bushing and decap spindle for consistent results
• O-ring spindle tensioner for smooth, controlled operation
• Elliptical expander ball and headed decap pin design
• Reduces case work-hardening from over-sizing

Specifications

Frequently Asked Questions

What's the difference between this full-length die and a neck-only die?

The full-length die sizes the entire case—body, shoulder, and neck—in one press stroke. Hornady also makes a Match Grade Neck Die for this caliber that sizes only the neck and bumps the shoulder, with no body sizing. Choose the full-length die if you need complete case dimensional control or are preparing brass for a new rifle; use the neck die for fireformed brass in a known chamber.

How do the interchangeable bushings work?

Each bushing is sized to your bullet diameter and desired neck tension. You install the bushing in the die, and it self-centers to size only the case neck. If you find your tension too tight or loose, you swap for another bushing (.002-inch larger or smaller) without replacing the entire die. This gives you precise control without over-sizing your brass.

Will this die work with factory 300 Ultra Mag brass?

Yes. Factory brass and once-fired brass both benefit from the controlled sizing this die provides. The bushing system lets you set tension based on your bullet and chamber specs rather than relying on a generic sizing approach that may over-work the brass.

Are bushings sold separately?

Hornady manufactures bushings in .002-inch increments. Check Hornady's current catalog or your reloading supplier for bushing availability and selection for this caliber.