The Lyman 7135130 is a Neck Size Die that provides reloaders with the ability to perfectly size the case neck to achieve the best bullet tension. This is crucial in maintaining the fireformed dimension of the case body.
One notable feature is that it significantly improves accuracy, as the case body fits snugly into the chamber. The Neck Size Die also comes with a decapping rod and a robust steel expander button. This specific model is designed for 6.5 Creedmoor.