Redding Series C Full Length Die Set For Bottleneck Cases .300 Black Out

The Redding Series C Full Length Die Set for .300 Blackout is a precision reloading die set built for shooters who demand tight tolerances and consistent ammunition across any standard SAAMI chamber. Whether you're loading for a AR-platform rifle, bolt gun, or other .300 Blackout platform, this full-length sizing set ensures your handloaded rounds chamber reliably and perform predictably downrange. Series C dies are purpose-built for the discriminating reloader who understands that die quality directly impacts ammunition consistency and safety.

Redding manufactures these dies from premium alloy steel, machined on Hardinge Super-Precision equipment to hold some of the tightest tolerances in the industry. Every die is heat-treated in atmospherically controlled furnaces to maintain dimensional stability and ensure a lifetime of reliable service. The polished die bodies cycle smoothly through your press, and each set passes final inspection and ultrasonic cleaning before shipment. The included storage box doubles as a cartridge loading block, keeping your workspace organized while you work up loads.

The set includes everything you need to get started: the full-length sizing die and seating die, a spare decapping pin, hex wrench, and a shellholder storage pocket built into the box itself. All Redding dies use the industry-standard 7/8-14 threaded bodies, so they'll fit any press built to that specification. If you reload .300 Blackout and want dies that'll outlast your shooting career, this is the set to trust.

Key Features

• Precision-machined from premium alloy steel to hold exceptionally tight tolerances
• Full-length sizing die ensures proper fit in any standard SAAMI .300 Blackout chamber
• Heat-treated and hand-polished for smooth, reliable operation
• Includes spare decapping pin, hex wrench, and shellholder pocket in storage box
• Industry-standard 7/8-14 threaded bodies fit all compatible presses
• Built to last—Redding stands behind their dies for the lifetime of the user

Specifications

Frequently Asked Questions

Will this die set work with my AR-15 .300 Blackout upper?

Yes. The Redding Series C full-length sizing die is engineered to produce ammunition that chambers reliably in any standard SAAMI .300 Blackout chamber, regardless of action type—including AR-platform rifles, bolt guns, and other firearms.

What press do I need to use this die set?

These dies have industry-standard 7/8-14 threaded bodies, so they're compatible with any reloading press built to that specification. Check your press manual to confirm compatibility.

What comes in the box?

The set includes the full-length sizing die, seating die, spare decapping pin, hex wrench, and a storage box that doubles as a cartridge loading block and includes a pocket for your shellholder.

How durable are Redding dies?

Redding dies are manufactured from premium alloy steel, heat-treated in atmospherically controlled furnaces, hand-polished, and inspected to tight tolerances. They're built to perform consistently throughout your reloading life.