A Neck Size Die allows the reloader to properly size the case neck for optimal bullet tension, while maintaining the fireformed dimension of the case body. Accuracy is increased when the case body closely fits into the chamber. The Neck Size Die includes a decapping rod and steel expander button.
- A Sizing Die is used to 'squeeze' the enlarged case back to its proper size and usually also to deprime it.
- For straight walled black powder cases.
- Will not overwork expensive brass.