A key feature of the Zero Sizing Die design is the precision-ground, full-length mandrel, which ensures the highest consistency in neck tension. These mandrels are interchangeable, giving reloaders the flexibility to choose the optimal neck tension for their needs. Made from 17-4PH Stainless Steel and black nitrided for enhanced durability, our mandrels are built for smooth, long-lasting operation. This high-quality construction guarantees reliable performance and precision in every reloading cycle.