Lee Precision .25-35 Winchester Custom Factory Crimp Die

The Lee Precision .25-35 Winchester Custom Factory Crimp Die takes the guesswork out of bullet seating by locking your rounds down with the firm, consistent crimp that factory ammunition delivers. If you've been chasing tighter groups and more uniform velocity with your hand-loads, this die addresses one of the most overlooked variables in the reloading process. A proper crimp isn't just about holding the bullet in place—it fundamentally changes how pressure builds in the chamber, which directly affects accuracy and consistency shot to shot.

The die's collet design squeezes the case mouth into the bullet's crimp groove with enough authority to make a real difference. Tests show that even bullets without a dedicated crimp groove will shoot more accurately when run through this die, because the firm grip forces pressure to build to a higher level before the bullet shifts. That more uniform pressure curve translates to less velocity variation—the kind of consistency that separates one-hole groups from scattered shots. Whether you're working up loads for precision rifle hunting or fine-tuning ammunition for competition, eliminating bullet runout and inconsistent crimp is worth the extra step.

The die is compatible with all standard 7/8"-14 reloading presses, so it slides into your existing setup without any special equipment. Keep in mind that a shellholder is sold separately. If you reload for vintage cartridges like the .25-35 Winchester, you already know that attention to detail pays dividends—this is exactly where it matters.

Key Features

• Collet-style crimping for firm, consistent bullet hold
• Improves accuracy by promoting uniform pressure curves and reducing velocity variation
• Effective even on bullets without dedicated crimp grooves
• Compatible with all standard 7/8"-14 reloading presses

Specifications

Frequently Asked Questions

Will this die work with my reloading press?

Yes, the Lee Precision Custom Factory Crimp Die is designed to fit all standard 7/8"-14 reloading presses, which covers nearly all modern single-stage and progressive press designs.

Do I need a dedicated crimp groove on my bullets for this die to work?

No. Testing demonstrates that this die will improve accuracy even with bullets that have no crimp groove, because the collet squeezes the case mouth firmly around the bullet. That firm hold alone creates the pressure-building consistency that improves groups.

What's included, and what do I need to buy separately?

The die itself is included. You'll need to purchase a shellholder separately if you don't already have one for the .25-35 Winchester.

How does a crimp actually improve accuracy?

A firm crimp delays bullet movement in the case until chamber pressure builds higher. This more uniform start pressure creates a more consistent pressure curve from round to round, which reduces velocity variation—the primary driver of vertical stringing and inconsistent groups.