RCBS 15469 Supreme Die Set .300 Winchester Magnum Reloading Dies

The RCBS 15469 Supreme Die Set delivers precision reloading capabilities for .300 Winchester Magnum cartridges with enhanced case forming and bullet seating accuracy. This three-die set incorporates RCBS's advanced engineering to produce consistent, match-grade ammunition for long-range shooting applications.

What Makes This Different

The Supreme series features precision-ground steel construction with tighter tolerances than standard die sets, typically holding dimensions within 0.0005 inches. Each die undergoes individual inspection and includes micrometer adjustments for repeatable powder charges and bullet seating depths. The carbide expander ball reduces case neck stress during resizing operations compared to standard steel expanders.

Key Features

• Three-die configuration: full-length sizing die, expander die, and bullet seating die with built-in roll crimp
• Precision-ground steel construction with heat-treated surfaces for extended service life
• Micrometer bullet seating die allows 0.001-inch seating depth adjustments
• Carbide expander ball reduces case neck tension variations
• Self-centering floating punch ensures consistent primer pocket uniformity
• Compatible with all standard 7/8-14 TPI reloading presses
• Includes detailed reloading data and step-by-step instructions

Reloaders report consistent velocities within 15 fps standard deviation when using proper powder measuring techniques with this die set. The .300 Winchester Magnum's long-range capabilities benefit significantly from the precise bullet seating and case preparation these dies provide. Weather-resistant finish protects against corrosion during storage in humid conditions.

Technical Specs

• Caliber: .300 Winchester Magnum
• Thread specification: 7/8-14 TPI standard
• Die material: Heat-treated alloy steel with corrosion-resistant finish
• Expander ball: Carbide construction
• Seating die adjustment: Micrometer with 0.001-inch increments
• Package contents: Sizing die, expander die, seating die, shell holder
• Manufacturer: RCBS (Rock Chucker Bullet Swage)
• Country of origin: United States

This die set represents a significant upgrade for reloaders seeking match-grade ammunition consistency from their .300 Winchester Magnum loads. The precision manufacturing and micrometer adjustments justify the investment for serious long-range shooters and hunters who demand sub-MOA accuracy from their handloaded ammunition.