Strongly recommended when reloading cast rifle bullets in bottleneck cases. In one step, a neck expander die expands the case neck and slightly flares the case mouth, critical for accurately seating bullets without shaving lead and bullet weight from their sides. Includes: neck expander die body, plug rod and expander plug.
I use the 35 caliber expander die to slightly flare the mouths of my 9.3 X 74R cases before seating jacketed bullets. It helps the bullets to seat smoother & straighter without any chance of deforming the case neck. The flare is removed when crimping the case mouth in a separate step.