Lee Precision Undersized Mandrels are used along with a Collet Sizing Die when the reloader wishes to use a bullet that is a slightly smaller diameter than the "standard" for a given caliber. This enables the case to be properly sized for the bullet diameter in use.
Lee Precision has been the innovative leader in affordable reloading products since 1958. All Lee Precision products are proudly cast, machined and assembled in the USA.
Specifications and Features:
Lee Precision 90007
For use with Collet Sizing Die