Lee Precision 90823 Factory Crimp Die 308 Win / 303 Sav

The Lee Precision Factory Crimp Die for .308 Winchester and .303 Savage ammunition is a specialized reloading tool designed to improve accuracy and consistency in your handloads. Unlike standard sizing dies, this crimp die applies a firm, even crimp that seats the bullet more securely in the case mouth—a key factor that many reloaders overlook when pursuing tighter groups and more predictable performance downrange.

How does a factory crimp actually help? A uniform crimp ensures that bullet movement is minimized during the pressure curve buildup in the chamber. This means pressure rises more consistently from shot to shot, which translates to reduced velocity variation and, in turn, tighter groups. The die features a collet mechanism that grips the case mouth and squeezes it into the bullet's crimp groove with precision. The benefit is real: testing shows that even bullets without a crimp groove shoot more accurately when run through a factory crimp die, because the mechanical hold itself improves pressure consistency.

This tool threads into any standard 7/8"-14 reloading press, so it integrates seamlessly into your existing setup. It's an essential die for serious rifle reloaders who want to extract every bit of accuracy from their ammunition, whether you're loading for precision rifle matches, long-range hunting, or just demanding tighter groups at the range. Add it to your die set after your sizing operation for a final, critical step in handload quality.

Key Features

• Collet-style crimp mechanism for firm, uniform bullet seating
• Improves accuracy by reducing velocity variation shot-to-shot
• Works with bullets with or without crimp grooves
• Compatible with all 7/8"-14 threaded reloading presses
• Designed specifically for .308 Winchester and .303 Savage cartridges

Specifications

Frequently Asked Questions

Will a factory crimp die work with my current reloading press?

Yes, provided your press has the standard 7/8"-14 die threads. This covers virtually all full-size single-stage and progressive presses on the market. You'll need to verify your press threading if you have an older or specialty unit.

What's the difference between this crimp die and the crimp function on my sizing die?

A dedicated factory crimp die applies a much firmer, more controlled crimp than the light taper crimp on a standard sizing die. This firm, uniform crimp reduces bullet movement during firing and improves pressure consistency, which is especially valuable for accuracy-focused reloading.

Do I need bullets with a crimp groove to use this die?

No. Testing shows that the factory crimp die improves accuracy even with bullets that have no crimp groove, because the collet mechanically locks the bullet in place. However, bullets with a crimp groove will seat even more securely.

Is a shellholder included?

No, the shellholder is sold separately. You'll need the correct shellholder for your cartridge to use this die.