Lee 90703 Collet 2-Die Set 257 Roberts

The Lee 90703 Collet 2-Die Set is a reloading toolset built specifically for the 257 Roberts, a classic bottleneck rifle cartridge favored by varmint hunters and traditional rifle shooters. Lee's Collet die design uses a collet to squeeze a mandrel inside the case neck, creating a precisely aligned neck while reducing run-out for improved bullet-to-bore concentricity.

This two-die set includes a Collet Neck-Sizing Die and a Dead-Length Bullet Seater, and ships with a matching shellholder. The neck-sizing collet squeezes the case mouth around a mandrel rather than pushing a button down through the neck, while the dead-length bullet seater indexes off the case mouth for precise, repeatable seating depth shot after shot.

Built as a dedicated bottleneck rifle die set, the Lee 90703 is designed for handloaders reloading the 257 Roberts cartridge. Pair it with a Lee reloading press and your preferred powder measure to round out a complete reloading bench for this classic chambering.