Rcbs Full Length Die Set - Group A Popular Rifle Cartridge .300 H&H

The RCBS Full Length Die Set for .300 H&H is a two-piece reloading system built for shooters who demand precision with one of the magnum rifle cartridges that defined long-range hunting and match-grade shooting. Whether you're preparing ammunition for your .300 Holland & Holland or handloading for precision rifle work, this die set handles the critical tasks of resizing and seating with the control serious reloaders expect.

The full-length sizer die in this set brings your bottleneck cases to SAAMI minimum dimensions, ensuring consistent chamber fit and reliable feeding. It sizes the case body, decaps spent primers, and opens the neck to accept fresh bullets. The die incorporates vents to prevent case damage from trapped air and excess lubricant—a thoughtful design detail that protects your brass. Headspace is held to minimum tolerances, so the sizing process doesn't inadvertently change case body length, which matters when you're chasing tight groups.

Paired with it is a seater die that seats and crimps in one operation, using a built-in roll crimper to secure the bullet as it seats. This two-stage approach—resize and decap, then seat and crimp—is the foundation of repeatable handloading for magnum rifle cartridges that generate chamber pressures requiring reliable bullet retention.

Key Features

• Full-length sizer die with integral expander-decapping unit for SAAMI-minimum case dimensions
• Seater die with built-in roll crimper for simultaneous seating and crimping
• Vented sizer die design prevents trapped-air and lubricant damage
• Headspace held to minimum tolerances for consistent case body length
• Designed for bottleneck rifle cartridges

Specifications

Frequently Asked Questions

What does a full-length sizer die do?

The full-length sizer die resizes the entire case body to SAAMI minimum cartridge dimensions, decaps the spent primer, and expands the neck to accept a new bullet. It's designed to hold headspace at minimum tolerances so the sizing operation doesn't change case body length.

Does this die set include a crimper?

Yes. The seater die includes a built-in roll crimper that secures the bullet as you seat it in a single operation.

What's included in this two-die set?

You get a full-length sizer die with expander-decapping unit and a seater die with bullet seater plug. This covers the two essential stages of reloading a bottleneck rifle cartridge.

Is this die set suitable for precision reloading and magnum cartridges?

Yes. The .300 H&H is a magnum rifle cartridge, and RCBS full-length die sets are engineered to deliver the dimensional consistency and headspace control that precision and magnum reloading demand.