Lee Precision 90188 Classic Bullet Sizing Kit .510 Caliber

The Lee Precision 90188 Classic Bullet Sizing Kit .510 delivers consistent bullet diameter control for precision reloading applications. This sizing kit ensures uniform bullet dimensions, reducing velocity variations and improving accuracy potential across multiple shooting disciplines.

What Makes This Different

Unlike standard bullet lubricants alone, this complete sizing system mechanically controls bullet diameter to exact specifications. The hardened steel sizing die maintains precise .510 diameter tolerances shot after shot. Cast bullets often vary in diameter due to alloy shrinkage and mold wear, making this sizing step critical for consistent performance.

Key Features

• Hardened steel sizing die maintains .510 diameter precision
• Includes bullet lubricant and gas check seating punch
• Compatible with standard reloading presses using 7/8-14 threads
• Handles both plain base and gas check bullets
• Reduces leading in barrel rifling through proper lubrication
• Accommodates bullets from 300 to 750 grains
• Works with wheelweight, linotype, and commercial cast alloys

This sizing system proves essential for competitive shooters using cast bullets in .50 BMG applications. The consistent diameter control reduces standard deviation in muzzle velocity, translating to tighter groups at extended ranges. Military surplus .50 caliber rifles particularly benefit from properly sized bullets that engage rifling uniformly. The included lubricant formulation withstands the high pressures and temperatures generated by large magnum cartridges.

Technical Specs

• Bullet diameter: .510 inches
• Die threads: 7/8-14 TPI standard
• Material: Hardened tool steel construction
• Finish: Black oxide corrosion resistance
• Compatible bullet weights: 300-750 grains
• Includes: Sizing die, lubricant, gas check punch
• Country of origin: United States
• Manufacturer: Lee Precision Engineering

Serious .50 caliber reloaders recognize that bullet consistency starts with proper sizing. This kit eliminates the guesswork in cast bullet preparation, delivering the uniformity required for precision shooting applications.