Lee's collet necksizing die uses a steel collet and precision mandrel to squeeze fired cases to exact specifications, reducing runout for superior accuracy and extended case life without lubrication.
The Lee Collet Necksizer Die represents a focused approach to ammunition preparation. Rather than sizing the entire case, this die concentrates on what matters most: the case neck.
A hardened steel collet squeezes the fired case neck onto a precision mandrel. This method creates a concentrically aligned case neck while significantly reducing runout—the wobble that degrades accuracy.
This die performs best with cases that have been fired in your specific firearm. Neck sizing maintains the case body's original dimensions, which improves fit and consistency in your rifle's chamber.
For reloaders prioritizing accuracy and case longevity, the Lee Collet Necksizer Die delivers measurable improvements in shot-to-shot consistency.