Redding Reloading 351 Winchester S.L. Three Die Set. This is necessary because it is not possible to full length resize straight wall cases and expand the neck for proper bullet fit in one operation. The Full Length resizing die contains a decapping rod assembly. The Expander Die contains a neck expanding plug. The conventional Seating Die includes a bullet guide built-in crimp ring and the proper seating plug. Features of Redding Reloading Full Length Three Die Sets for Straightwall Cases Dies are carefully machined on precision lathes capable of holding the tightest tolerances in the industry and heat treated in atmospherically controlled furnaces for a lifetime of use. Bullet Seating Micrometers are available for most conventional seating dies that accommodate most bullet styles. Package Contents: Redding Reloading Full Length Three Die Sets for Straightwall Cases Redding Reloading 80462: 351 Winchester S.L. Three Die Set