Lee 90039 New Lube & Size Kit .311 Diameter Sizer Die|Punch|Case 7|8x14 Threads in.

The Lee Precision 90039 lube and size kit offers cast bullet reloaders a straightforward, efficient way to prep bullets for loading. Designed for shooters who cast their own projectiles, this .311-diameter sizing die with integrated punch system streamlines the process of sizing and gas-check crimping in a single pass. The kit threads into any single-stage reloading press with standard 7/8x14" threads, making it a practical addition to most home reloading setups without requiring dedicated equipment.

Cast bullet sizing demands accuracy and consistency, and this kit delivers both by pushing bullets through the die nose-first—no special punch adapters needed. Gas checks, when used, are automatically seated and crimped into place as the bullet passes through. The included punch replaces your shell holder in the ram, and sized bullets are captured in the integral container to keep your workspace organized and prevent mix-ups. Because this approach eliminates the need for a top punch, setup is fast and repeatability shot-to-shot is straightforward.

Reloaders working with cast lead or hardened cast bullets in .311 diameter will find this kit removes one of the more tedious steps in the handloading cycle. The kit is complete for .311-diameter sizing; if you reload multiple diameters, you'll need separate sizing kits for each. Liquid bullet lubricant and your reloading press are sold separately. Keep in mind this kit is designed for single-stage press use only—it is not compatible with progressive or turret presses.

Key Features

• .311-diameter sizing die for cast bullets
• Integrated punch system—loads in place of shell holder in press ram
• Standard 7/8x14" threads fit most single-stage presses
• Bullets sized nose-first; no separate punch required
• Automatic gas-check seating and crimping
• Integral container captures sized bullets
• Single-pass sizing and crimp operation

Specifications

Frequently Asked Questions

Will this kit work with my progressive or turret reloading press?

No. The Lee 90039 is designed exclusively for single-stage press mounting. Progressive and turret presses use different ramming mechanisms and are not compatible with this kit.

Do I need to buy anything else to use this kit?

Yes. You'll need a single-stage reloading press to mount the die, and liquid bullet lubricant (such as Alox) to prepare bullets before sizing. The kit itself includes the die, punch, and collection container.

What bullet diameters does this kit cover?

This kit is sized for .311-diameter bullets. If you cast or reload bullets in other diameters, you'll need a separate sizing kit for each diameter you use.

How do I crimp gas checks with this kit?

Lubricate your cast bullets with liquid Alox, place a gas check on the bullet base, set the bullet on the punch, and push it through the sizing die. The die will size the bullet and crimp the gas check in place simultaneously.