Lee Precision, Inc. .257 Roberts/.257 Ackley Improved Rifle Collet Neck Sizing Die

The Lee .257 Roberts or .257 Ackley improved collet neck sizing die employs a steel collet to compress the fired case against a precision mandrel. This process ensures a precisely aligned case neck while minimizing runout, resulting in optimal accuracy and extended case life. The die sizes only the neck and does not require case lubrication. It is recommended for cases that have been fired exclusively through your firearm.