Lee Powder 90585 Through Expanding Pistol Die 45 ACP - The Exclusive Powder Through Expanding Die is only available with Lee dies and they permit charging the case while expanding the case mouth. Every Lee 3-Die Set includes this Powder Through Expanding Die at no extra cost. The powder funnel adapter can be replaced with a Lee Auto-Disk Powder Measure for fully automatic powder charging while the case mouth is being expanded.