Lyman Neck Expanding Pistol M Die for .44 Mag./.44 Special/.445 Super Mag . The Lyman Neck Expanding (M) Die has two steps. The first step expands the inside of the case neck to just under bullet diameter for precise case neck tension in the finished reload. The second step expands the case mouth to bullet diameter or slightly over. This allows the jacketed or cast bullet to be started perfectly centered in the case mouth and properly aligned with the axis of the case neck. Also in our store you can find a full line of Lyman Gunsmith and Reloading Equipment. For our complete selection of products by Lyman on sale please visit our Lyman page. For more Gunsmith and Reloading Equipment please visit our Gunsmith and Reloading Equipment store section. Specifications for Lyman Neck Expanding Pistol (M) Dies: Manufacturer: Lyman Gun Type: Pistol Package Contents: Lyman Neck Expanding Pistol (M) Die Lyman 7340820: Neck Expanding Pistol M Die for .44 Mag./.44 Special/.445 Super Mag - 7340820