The Redding .300 Weatherby Magnum Full Length 2-Die Set (MPN: 80252) is a precision handloading tool set designed to return fired cartridge cases to factory SAAMI specifications and seat projectiles accurately. Machined from heat-treated, case-hardened alloy steel on Hardinge Super-Precision lathes and hand-polished, this two-die set features an industry-standard 7/8"-14 thread interface to ensure direct compatibility with standard reloading presses. It provides full-length resizing, spent primer decapping, case neck expansion, and bullet seating with an integrated roll crimp for reloaders working with the .300 Weatherby Magnum cartridge.

Key Features

• Full-Length Resizing Die: Resizes the case body, shoulder, and neck back to factory dimensions while simultaneously decapping the primer via the integrated decapping rod assembly and expander button.
• Bullet Seating Die: Features an internal bullet guide to align .308 in (7.82 mm) diameter projectiles concentric to the case neck, along with a built-in roll crimp ring to secure bullets.
• Precision Steel Construction: Manufactured from case-hardened alloy steel to tight tolerances, minimising case runout and extending die service life.
• Standard Thread Mounting: Built with 7/8"-14 threads for compatibility with single-stage and turret reloading presses.
• Included Accessories: Supplied in a protective plastic storage case/loading block with a hex wrench and a spare decapping pin.

Specifications

• Calibre: .300 Weatherby Magnum
• Bullet Diameter Compatibility: .308 in / 7.82 mm
• Thread Pitch: 7/8"-14 standard thread
• Die Set Type: 2-Die Full Length Set (Sizing Die and Seating Die)
• Material: Case-hardened, heat-treated alloy steel
• Power Requirements: Non-powered manual tool (0W)
• Packaged Shipping Weight: Approximately 0.5–0.6 kg
• Required Shellholder: Standard #6 Shellholder (sold separately)

Who is the Redding 300 Wby Weatherby Magnum Full Length Die Set for?

• Handloaders loading for multiple rifles — requires returning brass fired across varying chambers back to factory SAAMI dimensions on standard 7/8"-14 thread presses so ammunition chambers smoothly across any .300 Weatherby Magnum action.
• Big game hunters — requires full-length body and shoulder sizing to eliminate chambering resistance in field conditions when handloading standard .308 in (7.82 mm) projectiles into .300 Weatherby Magnum cartridge cases.

Less suitable for: Handloaders seeking to load alternative .30-calibre cartridges such as .300 Winchester Magnum or .300 PRC, which will cause case damage due to chamber profile differences and require cartridge-specific full-length die sets; or single-rifle precision shooters looking to size only the neck without working the shoulder, who are better served by a dedicated neck-sizing or bushing die set.