Lee Precision 90725 Factory Crimp Die 5.7x28 FN Bottleneck

The Lee Precision 90725 Factory Crimp Die delivers consistent bullet seating and case mouth crimping for 5.7x28 FN cartridges. This bottleneck-specific die ensures proper cartridge dimensions while maintaining the precise tolerances required for reliable feeding in FN Five-seveN pistols and P90 platforms.

What Makes This Different

Unlike standard roll crimp dies, the Factory Crimp Die uses Lee's patented collet system to apply uniform pressure around the entire case mouth. This design prevents case deformation while creating the exact crimp profile specified by FN for optimal performance. The die maintains consistent overall cartridge length within 0.003 inches, ensuring reliable chambering across different firearms.

Key Features

• Patented collet crimping system prevents case mouth distortion
• Maintains SAAMI-spec overall cartridge length for reliable feeding
• Heat-treated steel construction with precision-ground surfaces
• Standard 7/8-14 thread fits all major reloading presses
• Includes detailed instructions and load data references
• Works with all 5.7x28 bullet weights from 27 to 40 grains
• Knurled lock ring prevents die movement during operation

The 5.7x28 FN cartridge requires precise crimping to function properly in both semi-automatic pistols and submachine guns. This die produces the light taper crimp necessary for reliable extraction and ejection while maintaining the case neck tension needed for consistent velocities. Reloaders report improved accuracy and reduced feeding issues when switching from standard crimping methods to the Factory Crimp Die system.

Technical Specs

• Caliber: 5.7x28 FN
• Thread: 7/8-14 TPI
• Material: Heat-treated alloy steel
• Finish: Black oxide coating
• Die type: Bottleneck Factory Crimp
• Compatibility: All standard reloading presses
• Manufacturer: Lee Precision, USA
• Model: 90725

This Factory Crimp Die addresses the unique requirements of the 5.7x28 FN cartridge that standard dies often struggle with. The specialized design ensures each round meets factory specifications for optimal performance in high-end firearms that demand precision ammunition.