The Lee Precision Collet Neck Sizing Die (model 91013) for 7MM Express and .280 Remington preserves the perfect fit of your fire-formed cases by using a collet to squeeze the case neck against a precision-formed mandrel, creating a precisely aligned case neck with greatly reduced run-out. Neck-sized cases can last up to ten times longer than full-length sized cases, making this die an excellent choice for handloaders seeking maximum case longevity and consistency.
This collet neck sizing die eliminates the need to lubricate the case, streamlining your reloading workflow and reducing the variables that can affect sizing uniformity. Neck sizing should only be used with cases that will be fired in the same gun, as the die is optimized for fire-formed brass that maintains the chamber profile of your specific firearm. This die is recommended for cases that have been fired through your firearm only.
Lee has shortened the working portion of the collet so that a short section of the case neck is not resized, which reduces working on the case mouth to almost zero and leaves the case mouth expanded enough to allow the bullet base to enter freely. This design extends case life by minimizing stress on the portion of brass most prone to failure. The die comes as a neck sizing die only; undersized flash hole decap mandrels are sold separately.
