Lee Precision 7.62x39 .307 EZ X Expander decapping die

Lee Precision EZ X Expander 7.62X39.307 – 7.62x39 Russian

The Lee Precision EZ X Expander is the decapping-expander rod that operates inside Lee full-length resizing dies: in a single press stroke, it removes the spent primer and expands the case neck to the necessary diameter for bullet seating. This version, designated by Lee as EZ X EXP 7.62X39.307, is designed for the 7.62x39 Russian, 7.5x55 Swiss (Schmidt-Rubin), and 303 Savage, and is the replacement part to order when the decapping pin bends or breaks, a common occurrence with cases featuring crimped primers.

It consists of a single steel rod: one end functions as the decapping pin, while the intermediate bulge — the .307" expander ball — internally resizes the case neck as the case exits the die. The total length specified by Lee is 3.370". Lee produces the same .307" diameter on rods of different lengths — 3.370" for medium cases, 3.620" for the 30-06 class, and 3.960" for large-capacity magnums — so it is the case length, not just the bullet diameter, that determines which rod to order. In the Lee full-length die exploded view, the rod is held in the die body by the decapper clamp (code SD2151) and the O-ring (code SD2153), both of which are separate replacement parts. For the 7.62x39, Lee also produces a .310" version (code SE1935): the choice depends on the barrel groove diameter and the diameter of the bullets used.

Main features

• Lee designation: EZ X EXP 7.62X39.307
• Expander diameter: .307"
• Total length: 3.370"
• Dual function: neck expansion and decapping in a single operation
• Quantity specified by Lee: 1 piece per resizing die
• Calibers indicated by Lee: 7.62x39 Russian, 7.5x55 Swiss (Schmidt-Rubin), 303 Savage

Recommended use

Replacement part for Lee full-length resizing dies in 7.62x39 Russian, 7.5x55 Swiss (Schmidt-Rubin), and 303 Savage calibers. Lee lists it among the spare parts for the 7.62x39 Russian RGB set. The rod is removed from the die body by loosening the clamp collar and must be reassembled while maintaining alignment with the case flash hole.

Package contents

The replacement part is supplied individually and includes only the decapping-expander rod. It does not include the die body, the clamp collar (SD2151), or the O-ring (SD2153), which Lee lists as separate spare parts.

Manufacturer code: SE2024