Redding Expand Mandrel

• Use with Redding Precision Expanding Die

Redding Expander Mandrel 

The Redding Expander Mandrel is a precision reloading tool designed to uniform the inside diameter of cartridge case necks for 7mm (.284 caliber) cartridges. It’s used with a compatible expanding die body and helps achieve consistent neck tension, which is critical for accuracy and repeatable performance.

These mandrels are machined from hardened tool steel and ground to very tight tolerances, allowing smooth, concentric expansion of the case neck.

First two digits after decimal place is the calibre i.e .22xx  = 22 Cal.

Second two digits are in thou'