Hornady Powder Through™ Expanders .500 / .501Powder Through™ Expanders (PTX™) are designed to work in conjunction
with the Case Activated Powder Drop. These Expanders eliminate the need
for a separate case mouth expander die on the Lock-N-Load® AP™ press,
freeing up an extra station for a taper crimp die or powder cop. The
Expanders work for lead, plated and jacketed bullets.