LEE Collet Die / Single Case Neck Sizing Die 7x57 Mauser

LEE Collet Die / Neck Sizing Die 7x57 Mauser
The LEE Collet Die set consists of a standard seating die and a neck sizing die; both die bodies are made of hardened steel, and each Collet Die set also includes a shell holder and a powder measure. The special feature of the Collet Die set is the adjustable neck sizing die; it only sizes the neck of the case using a collet. As the case is raised into the die, the shell holder also pushes the collet upwards, which then compresses the neck of the case. Depending on how far the case is pushed into the sizing die, the case will be sized more or less. Lubricating the case is no longer necessary. The case is only deformed as much as is required for seating the bullet. The more the neck of the case is sized, the greater the extraction resistance of the bullet, and the tighter the bullet fits. The LEE Collet Die set is suitable only for new cases or those that have always been fired from the same firearm, as the body of the case is not sized. These die sets are not suitable for cartridges that are to be fired from semi-automatics or lever-action rifles.