Redding Series A Full Length Die Set for Bottleneck Cases .300 Win Mag

The Redding Series A Full Length Die Set for Bottleneck Cases in .300 Win Mag gives you the precision tooling you need to load ammunition that chambers reliably in any standard SAAMI .300 Win Mag chamber. Built for serious hunters and competitive shooters who depend on consistent, headspace-correct rounds, this two-die set handles the complete full-length resizing and bullet seating process with the kind of precision Redding has earned over decades of reloading equipment manufacturing.

The full-length resizing die includes a decapping rod assembly with a neck expander button, sizing your fired cases back to spec while removing spent primers in one pass. The seating die features a built-in bullet guide and crimp ring with the proper seating plug for your cartridge, letting you seat and crimp in a single stroke—faster, more consistent than separate operations. Both dies thread into standard 7/8-14 die bodies, so they'll fit any compatible single-stage or progressive reloader.

Redding's manufacturing standards are baked into every set. Their dies are machined on Hardinge Super-Precision lathes that hold industry-leading tolerances, then heat-treated in atmospherically controlled furnaces to guarantee durability. Each die is hand-polished for smooth, flawless operation, undergoes final inspection, and is ultrasonically cleaned before shipping. You're not just buying a tool—you're buying peace of mind that comes with ammunition that fits your chamber right.

The packaging doubles as a cartridge loading block and storage box, with room for a spare decapping pin, hex wrench, and your shellholder, so you've got everything organized and close at hand on the bench.

Key Features

• Complete full-length resizing and bullet seating die set for .300 Win Mag bottleneck cases
• Full-length resizing die with integrated decapping rod assembly and neck expander button
• Seating die with built-in bullet guide, crimp ring, and matched seating plug
• Precision-machined on Hardinge Super-Precision lathes for tight, consistent tolerances
• Heat-treated in atmospherically controlled furnaces for extended die life
• Hand-polished dies for smooth, reliable functioning
• Standard 7/8-14 threaded bodies compatible with most reloading equipment
• Includes storage/loading block box, spare decapping pin, hex wrench, and shellholder storage

Specifications

Frequently Asked Questions

What's included in the Redding Series A die set?

The set includes two dies (full-length resizing and seating), a storage and loading block box, a spare decapping pin, a hex wrench, and a place to store your shellholder. Everything you need to get started is in the box.

Will this die set work with my reloading press?

The Redding Series A dies use the industry-standard 7/8-14 threaded bodies, so they'll fit any compatible single-stage or progressive reloader that accepts standard dies in that size.

What makes Redding dies different from other reloading die brands?

Redding dies are machined on Hardinge Super-Precision lathes capable of holding the tightest tolerances in the industry, then heat-treated in atmospherically controlled furnaces and hand-polished. This process ensures your reloaded ammunition will chamber properly in any standard SAAMI .300 Win Mag chamber and that the dies will last a lifetime.

Can I resize cases that have been fired in different .300 Win Mag rifles?

Yes. The full-length resizing die brings fired cases back to SAAMI spec, so your reloaded ammunition will fit properly in any standard .300 Win Mag chamber regardless of the action type or rifle it was originally fired in.