Area 419 S-Series 300 Win Mag Sizing Die 7/8in Thread. Specifications for Area 419 S-Series 300 Win Mag Sizing Die: Manufacturer: Area 419 Color: Black Fabric/Material: Steel Width: 1.25 in Weight: 2 lb Height: 1.25 in Length: 3.6 in Gun Type: Rifle Features of Area 419 ZERO S-Series Sizing Dies Precision Ground Expander Mandrels (all dies ship with a .002 neck tension mandrel or add more increments with our MANDREL KIT) Full-Length Neck to Extractor Sizing Spring Ejection for Spent Primers Replaceable Steel Decap Pins Reamer Cut to Exacting Dimensions for a TRUE Size (no more sticky bolt after the second firing) Hydraulic Shoulder Pressure Relief Package Contents: Area 419 S-Series 300 Win Mag Sizing Die Area 419 419-ZERODIE-S300WM: S-Series 300 Win Mag Sizing Die 7/8in Thread