Deluxe Die Set for Bottleneck Cases Features The quality and accuracy of your reloaded ammunition depends largely on the quality of the equipment you use to assemble it. Deluxe die sets for bottleneck cases contain three dies. They are a special packaging of Redding s full length die sets with the addition of a neck (NK) sizing die. Deluxe Die Set for Bottleneck Cases Specifications Full Length Dies with sizing die