Powder 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 AP progressive press, freeing up an extra station on your progressive press for a taper crip die or powder cop. The Expanders work for lead, plated and jacketed bullets and can be used with the Bullet Feeder for plated and jacketed bullets.