This neck expander plug is .377" diameter, for loading lead .377" sized bullets, as a perfect fit without deformation, in .38-55 WCF, .38-56 Winchester, .38-50 Ballard, and similar .38 caliber cartridges.
Use this neck expander plug in our #LEE-DIE-45-EX die body, with standard 7/8-14 threads, in your reloading press. This Lee neck expander die body is also supplied in our #LEE-DIE-4570 die set for the .45-70 Government.
You will also need our #DIE-38-COMPRESSION black powder compression plug, to compress the powder and over-powder card to the correct depth, to allow hand seating your bullet, in .38 caliber cartridges.
