Lee Classic Bullet Sizing Lee 90057 New Lube & Size Kit .457

The Lee Classic Bullet Sizing Kit with New Lube for .457 caliber (Model 90057) is a straightforward solution for reloaders who cast their own bullets and need to size them efficiently. If you're working with cast projectiles, this kit lets you skip the complexity of separate nose punches and get properly sized bullets ready for loading—all by pushing them through a sizing die on your single stage press. The integrated approach means less fiddling and faster prep work between casting and loading.

Cast bullets need to be sized down slightly from their as-cast diameter to chamber reliably, and this kit handles that job without requiring you to invest in a full bullet-mold top punch setup. Sized bullets drop into a collection container as they pass through, keeping your bench organized. The kit is designed to work with standard 7–8x14" threaded single stage presses, so if you already have a basic press on your bench, you're ready to go. The sizing die for .457 caliber is calibrated to handle the job; Lee recommends choosing a sizing die roughly .001" larger than your bullet's groove diameter for best results.

One of the kit's practical features is its ability to seat and crimp gas checks at the same time you're sizing, provided you use liquid alox lubricant (sold separately) and press a gas check onto the bullet base before sizing. This consolidates steps and saves time if you're working with gas-checked cast bullets for higher-velocity loads. Press and bullet lubricant are not included and must be sourced separately.

Key Features

• Sizes cast bullets nose-first—no special nose punches required
• Compatible with any single stage reloading press with standard 7–8x14" threads
• Automatically seats and crimps gas checks during sizing (with liquid alox and gas checks)
• Includes collection container to capture sized bullets
• Complete for .457 caliber sizing
• Simplifies cast bullet prep without need for bullet mold top punch

Specifications

Frequently Asked Questions

What press does this bullet sizing kit work with?

The Lee Classic Bullet Sizing Kit is designed for single stage reloading presses only. It fits any press with standard 7–8x14" threads. The punch is installed in place of the normal shell holder in the press ram.

Do I need a bullet mold top punch to use this kit?

No. Unlike traditional cast bullet sizing, this kit eliminates the need for a separate top punch from your bullet mold. Bullets are pushed through nose-first, making a top punch unnecessary.

Can this kit crimp gas checks?

Yes. When you lubricate bullets with liquid alox, press a gas check onto the bullet base, and push the bullet through the sizing die, the kit will automatically seat and crimp the gas check in place while sizing the bullet.

What else do I need to use this kit?

You'll need a single stage reloading press, bullet lubricant (liquid alox is recommended if you're using gas checks), and cast bullets. The press and lubricant are sold separately and not included with this kit.