Lee Precision 90960 Collet Die 30-06 Springfield Neck Sizing

The Lee Precision 90960 Collet Die delivers precise neck sizing for 30-06 Springfield cartridges without overworking brass cases. This specialized reloading die extends case life significantly compared to full-length sizing methods.

What Makes This Different

Unlike traditional full-length sizing dies, this collet die only sizes the neck portion of fired cases, preserving the fire-formed chamber dimensions. The mandrel-based design applies uniform pressure around the entire neck circumference, eliminating the uneven sizing common with expander ball systems. Cases maintain their fire-formed shape to the specific chamber, often improving accuracy potential by 15-20% over full-length sized brass.

Key Features

• Neck-only sizing preserves fire-formed case dimensions for improved accuracy
• Hardened steel collet construction with precision-ground mandrel
• Standard 7/8-14 threading fits all major reloading presses
• No expander ball required - eliminates case neck runout
• Works with cases fired in bolt-action and single-shot rifles
• Extends brass case life by 3-5 additional reloading cycles
• Includes detailed instructions for proper setup and use

Bolt-action rifle shooters achieve the most benefit from collet die sizing, as the minimal case working preserves dimensional consistency shot after shot. Competition shooters report tighter groups when switching from conventional dies to collet sizing systems. The reduced case working also means less trimming frequency, as cases stretch minimally during the sizing process. This die works exclusively with cases fired in the same chamber where they will be used again.

Technical Specs

• Caliber: 30-06 Springfield (.308 diameter)
• Threading: Standard 7/8-14 TPI
• Construction: Heat-treated alloy steel
• Finish: Black oxide coating for corrosion resistance
• Compatible with: Lee, RCBS, Hornady, Dillon presses
• Mandrel diameter: .306 inches
• Overall length: 3.2 inches
• Made in USA with lifetime warranty

This collet die represents the most efficient method for sizing 30-06 cases when maximum accuracy takes priority over convenience. Serious handloaders who fire cases in the same rifle consistently will see measurable improvements in both precision and brass longevity.