Lee Precision 90057 Classic Bullet Sizing Kit .457 Caliber

The Lee Precision 90057 Classic Bullet Sizing Kit delivers consistent .457 caliber bullet dimensions for improved accuracy and reduced leading in cast bullet applications. This comprehensive sizing solution addresses the common problem of inconsistent bullet diameters that can affect performance in .45-70 Government and similar large bore cartridges.

What Makes This Different

Unlike basic push-through sizers, this kit combines precision sizing with lubrication in a single operation. The hardened steel sizing die maintains exact .457" diameter tolerance while the integrated lubrication system applies consistent coating. This dual-action approach reduces bullet deformation compared to separate sizing and lubrication steps, resulting in more uniform projectiles.

Key Features

• Precision .457" sizing die with hardened steel construction
• Integrated bullet lubrication system for reduced leading
• Compatible with Lee Bullet Lube and similar products
• Handles cast bullets from 200 to 500 grains effectively
• Standard 7/8"-14 threading fits most reloading presses
• Includes sizing die, punch, and detailed instructions
• Works with round nose, flat point, and semi-wadcutter profiles

Field testing shows properly sized .457 bullets reduce barrel leading by up to 75% compared to unsized cast projectiles. The consistent diameter improves accuracy in rifles chambered for .45-70 Government, .458 Winchester Magnum, and .450 Marlin. Hunters report tighter groups at 100 yards when using properly sized bullets, particularly important for large game applications where precision matters.

Technical Specs

• Sizing diameter: .457 inches (±0.0005")
• Threading: Standard 7/8"-14 TPI
• Material: Hardened tool steel die body
• Compatible bullet weight range: 200-500 grains
• Requires: Lee Bullet Lube or equivalent
• Press compatibility: Most single-stage and turret presses
• Country of origin: United States
• Manufacturer warranty: Lee Precision standard coverage

This sizing kit represents essential equipment for serious cast bullet shooters who demand consistent performance from their handloaded ammunition. The combination of precision sizing and lubrication capability makes it particularly valuable for high-volume shooters. Quality construction ensures years of reliable service in demanding reloading applications.