Redding Series A Full Length Die Set for Bottleneck Cases .375 H&H Mag

The Redding Series A Full Length Die Set for Bottleneck Cases .375 H&H Mag is the precision reloading die set built for handloaders who demand consistency and durability with one of hunting's most respected magnum cartridges. This two-die set pairs a full-length resizing die with a seating die, engineered to deliver SAAMI-spec ammunition that chambers reliably in any standard action. Whether you're handloading for a classic magnum rifle or a modern bolt gun, Redding's Series A dies give you the tight tolerances and long-term reliability that serious reloaders depend on.

Redding manufactures these dies from premium alloy steels machined on Hardinge Super-Precision lathes to hold some of the tightest tolerances in the industry. The resizing die features a decapping rod assembly with integrated neck expander button; the seating die includes a built-in bullet guide, crimp ring, and proper seating plug sized for .375 H&H Mag. All dies undergo controlled-atmosphere heat treatment to maintain dimensional stability and are hand-polished, inspected, and ultrasonically cleaned before packing. The result is a die set that will outlast decades of reloading and produce ammunition as consistent as your handloading technique allows.

Setup is straightforward: both dies use the industry-standard 7/8-14 threaded bodies that fit any compatible reloading press. The included die box doubles as a cartridge loading block and storage solution, with slots inside for your shellholder, spare decapping pin, and hex wrench. That attention to detail—from machining to packaging—is what separates Redding from commodity die manufacturers and why handloaders who shoot magnum rifle cartridges keep coming back.

Key Features

• Full-length resizing die with decapping rod and integrated neck expander button
• Seating die with built-in bullet guide, crimp ring, and seating plug
• Precision-machined from premium alloy steel on Hardinge Super-Precision equipment
• Heat-treated in atmospherically controlled furnaces to guarantee dimensional stability and long life
• Hand-polished and ultrasonically cleaned for smooth, reliable operation
• Industry-standard 7/8-14 threaded die bodies
• Includes storage die box with loading block compartments, spare decapping pin, hex wrench, and shellholder storage

Specifications

Frequently Asked Questions

Will this Redding die set work with my .375 H&H Mag rifle?

Yes. Redding Series A dies are designed to produce ammunition that properly fits any standard SAAMI-spec .375 H&H Mag chamber, regardless of your action type—whether it's a classic magnum bolt gun, double rifle, or other standard design.

What's the difference between the full-length resizing die and seating die?

The resizing die contains a decapping rod assembly with an integrated neck expander button that sizes the case back to factory dimensions and removes spent primers. The seating die includes a bullet guide, crimp ring, and seating plug that seats your bullet to proper depth and applies a crimp if desired.

Do I need a shellholder to use these dies?

Yes, a shellholder is required to operate these dies in a reloading press. The set does not include a shellholder, but the die box features a dedicated compartment to store one with your dies for convenient access.

What caliber-specific components are in this set?

All die components—the neck expander button, bullet guide, crimp ring, and seating plug—are engineered and sized specifically for .375 H&H Mag ammunition. The dies themselves use the universal 7/8-14 thread so they fit any compatible reloading press.