Lee Precision PM Expander Plug .458 Winchester for powder-through expanding die – SE2898

Lee Precision PM expand plug .458 Winchester – SE2898

Original Lee Precision replacement expander plug for the .458 Winchester caliber. This is the internal component of the powder-through expanding die, the expansion die through which the powder charge also descends in Lee progressive presses and die sets.

The plug is the element that performs the work on the case: the calibrated cylindrical portion opens the inside of the neck to the correct diameter to receive the bullet, while the short conical section at the entrance creates the mouth flare that prevents lead or plated bullets from being scratched during seating. Unlike a simple expander, the plug is drilled through its entire length so that the powder measured by the dispenser mounted above the die falls into the case in the same step that expansion occurs. This is a wear-prone part specific to the caliber: it is not interchangeable between cartridges of different diameters, and a worn plug produces irregularly expanded necks resulting in non-uniform bullet retention.

Main features

• Caliber: .458 Winchester
• Function: neck expansion and mouth flaring
• Through-hole for the passage of the powder charge
• Original Lee Precision replacement part, caliber-specific

Recommended use

Replacement of the expander plug in the Lee powder-through expanding die for the .458 Winchester caliber, after verifying the part number on the official diagram of your die set.

Package contents

The expander plug only. The die body, adapter funnel, and powder measure are not included.

Manufacturer code: SE2898