Hornady 546366 Custom Grade 2-Die Set .303 British Sizing Seater

The Hornady 546366 Custom Grade Series I 2-Die Set delivers precision reloading components specifically engineered for .303 British cartridges. This professional-grade die set combines Hornady's proven manufacturing standards with practical features that streamline the reloading process for both novice and experienced handloaders.

What Makes This Different

Hornady's Custom Grade dies feature heat-treated steel construction with precise tolerances that exceed industry standards. The sizing die incorporates an expander ball system that ensures consistent neck tension, while the seating die provides micrometer-adjustable bullet seating depth. These dies produce ammunition with concentricity measurements typically within 0.003 inches, compared to 0.005+ inches common with standard dies.

Key Features

• Full-length sizing die with decapping pin removes spent primers and resizes cases to SAAMI specifications
• Bullet seating die with built-in roll crimp ensures consistent overall cartridge length
• Heat-treated steel construction withstands repeated use without dimensional changes
• Standard 7/8-14 threading fits all major reloading presses including RCBS, Lee, and Hornady models
• Expander ball sized for .312-inch bullet diameter specific to .303 British requirements
• Includes detailed instructions with recommended powder charges and bullet specifications
• Zip-Spindle design on seating die prevents damage to bullet tips during seating process

Field testing demonstrates these dies consistently produce ammunition that groups within 2 MOA at 100 yards when paired with quality components. The sizing die handles military surplus brass effectively, returning fired cases to proper dimensions for reliable chambering. Competition shooters report improved accuracy over factory ammunition, while hunters appreciate the ability to tailor loads for specific game requirements. The steel construction maintains dimensional stability through temperature extremes from -20°F to 140°F.

Technical Specs

• Caliber: .303 British
• Thread pitch: 7/8-14 TPI standard
• Material: Heat-treated alloy steel
• Finish: Black oxide coating
• Die height: 3.5 inches
• Expander ball diameter: .312 inches
• Compatible with all standard single-stage and turret presses
• Made in USA with lifetime warranty
• Includes lock rings and detailed reloading manual

This die set represents the standard for .303 British reloading, combining proven engineering with manufacturing precision that ensures consistent results. Quality components like these typically remain in service for decades, making this investment essential for serious .303 British shooters.