Lee 90725 Factory Short Bottle Neck Crimp Pistol Die 5.7X28 Fabrique Nationale

The Lee 90725 Factory Short Bottle Neck Crimp Pistol Die is purpose-built for reloaders working with 5.7x28mm FN ammunition. Unlike standard sizing dies, a dedicated crimp die adds a critical final step to your reloading sequence—one that can measurably improve consistency and accuracy. This die applies a firm, controlled crimp that seats the bullet securely in the case, helping pressure build uniformly from shot to shot.

If you're already investing time into precision reloading for the 5.7x28mm, a separate crimp die addresses a real problem: inconsistent bullet seating allows velocity to vary between rounds, which shows up as vertical stringing downrange. A proper crimp locks the bullet in place and lets chamber pressure develop more predictably. The result is tighter shot groups and more reliable ballistics, whether you're shooting for accuracy testing, competition, or just expecting better performance from your ammunition.

Lee Precision's crimp dies are straightforward to set up and run on any standard reloading press. This is a short bottle neck design, so verify it matches your press and your current reloading setup before purchase. If you're new to crimping, the fundamentals are simple: once you dial in the correct crimp depth, consistency from round to round becomes automatic.

Key Features

• Factory crimp design for 5.7x28mm FN ammunition
• Applies firm, controlled bullet crimp to improve accuracy
• Helps standardize pressure curves and reduce velocity variation
• Works with standard reloading press equipment
• Short bottle neck configuration

Specifications

Frequently Asked Questions

Do I need a separate crimp die or can my sizing die handle it?

Many reloaders use a dedicated crimp die as the final step because it applies a more controlled and consistent crimp than a sizing die alone. This die is engineered specifically for that purpose with the 5.7x28mm FN.

What press does this die work with?

This is a short bottle neck crimp die designed for standard reloading presses. Confirm your press setup and any existing die equipment for compatibility before ordering.

Will crimping really improve my accuracy?

According to testing, a firm crimp can improve accuracy by ensuring bullets don't move during firing, which allows pressure to build more uniformly and reduces velocity variation from round to round—both factors that affect accuracy.

Is this die used alone or as part of a die set?

This is a single crimp die and is typically used as the final step after you've sized and loaded your cases with powder and bullet using other dies in your reloading sequence.