Lyman Carbide 4-Die Sets feature a separate taper crimp die and two-step neck expander M die. The M die improves the accuracy of cast and jacketed bullets. The M die doesn't stretch the case. Working in a two-step process, the first step expands the inside of the case neck to just under the bullet diameter. The second step expands the case mouth to bullet diameter or slightly over so that the bullet can be started perfectly centered. Carbide dies do not require the use of case sizing lube.

I have used this twice... worked perfectly
$50 shipped conus.
Pics sent to txt or email. Thx
Carl

https://www.natchezss.com/lyman-precision-pistol-dies-carbide-4-die-set-45-acp.html