Lee Precision Collet 2-Die Set – 257 Roberts

The Lee Precision Collet 2-Die Set for 257 Roberts (Lee part no. 90703) uses a collet-style sizing die that squeezes a mandrel into the case neck, producing a precisely aligned neck while reducing runout compared to a conventional expander-ball die. The set pairs that collet die with a Dead Length Bullet Seater Die, and includes a shell holder, powder dipper, and instructions with load data, giving 257 Roberts handloaders a complete way to size and seat with tighter concentricity.

Key Specifications

• Built specifically for the 257 Roberts cartridge as a collet 2-die set.
• Collet Die squeezes a mandrel into the neck for a precisely aligned case neck with reduced runout.
• Paired with a Dead Length Bullet Seater Die for consistent, non-crimping bullet seating.
• Includes a Shell Holder, Powder Dipper, and printed instructions and load data.

Frequently Asked Questions

How is a collet die different from a standard sizing die? Instead of an expander ball pulled back through the neck, a collet squeezes a mandrel into the case neck, which typically reduces runout and improves concentricity.

Does this set include a shell holder? Yes, a shell holder is included along with the collet die, seater die, powder dipper, and instructions.

Buy the Lee Precision Collet 2-Die Set for 257 Roberts

Tighten up concentricity on your 257 Roberts handloads with this complete Lee collet die set. See more from Lee Precision in our reloading equipment selection. Order it from our Lubbock, Texas gun shop for fast, reliable shipping.