Lee 90037 New Lube & Size Kit .308 Diameter Sizer Die|Punch|Case 7|8x14 Threads in.

The Lee 90037 New Lube & Size Kit is a dedicated casting solution for reloaders who want to process .308-diameter cast bullets efficiently. This complete kit works with any single-stage reloading press (standard 7/8x14 threads) and streamlines the sizing and gas-check process without requiring separate nose punches or special tooling. If you're casting your own .308 bullets for rifle loads and want a fast, straightforward way to prepare them for loading, this kit handles both sizing and gas-check crimping in one operation.

The system works by pushing bullets nose-first through the sizing die, which means no fussy alignment or specialized punch geometry—just place the bullet on the included punch and let the press do the work. Gas checks are automatically seated and crimped as the bullet passes through the die. Sized bullets drop into a capture container, keeping your workspace organized and your finished rounds safe. The entire kit is self-contained, so you're not hunting for pieces or buying add-ons to get started.

This is a press-mounted tool only; you'll need to supply your own single-stage reloading press and liquid alox or similar bullet lubricant. The kit is sized specifically for .308-diameter bullets, so verify that your cast bullets have a groove diameter roughly .307" (sizing dies work best when they're about .001" larger than groove diameter). If you're stepping into cast-bullet reloading for .308 hunting or target loads, this kit removes a lot of the guesswork and gets you consistent, properly crimped gas checks every time.

Key Features

• Complete sizing and gas-check crimping in one operation
• Nose-first design eliminates need for specialized nose punches
• Works with any single-stage press (7/8x14 threads)
• Sized bullets captured in included container for organization
• Automatic gas-check seating and crimping

Specifications

Frequently Asked Questions

What press do I need for the Lee 90037 sizing kit?

You'll need a single-stage reloading press with standard 7/8x14 threads. The kit will not work with turret, progressive, or bench-mounted presses designed for other thread sizes.

Can this kit size bullets and crimp gas checks at the same time?

Yes. Gas checks are automatically seated and crimped as the bullet moves through the sizing die. You'll lubricate the bullets with liquid alox first, slide a gas check onto the bullet base, then push the assembly through the die in one stroke.

What cast bullet diameter should I use with this kit?

This kit is designed for .308-diameter cast bullets. For best results, select bullets with a groove diameter of approximately .307" (about .001" smaller than the die), so the die sizes them down to a tight, consistent finish.

What else do I need to buy separately?

You will need a single-stage reloading press and liquid alox bullet lubricant. The kit includes the sizing die, punch, and container, but not the press itself or lubricant.