The Redding 7.62x39 Russian Form & Trim Die (MPN: 83129) is a dedicated reloading tool designed to trim and form brass cartridge cases to precise chamber dimensions. Machined with standard 7/8"-14 threads, this solid steel die allows handloaders to shorten cases and form intermediate brass without subjecting cases to excessive full-length sizing or unnecessary work-hardening. Cases are raised into the die using a standard reloading press, allowing excess case neck material protruding from the case-hardened top surface to be filed flush to exact specification.

• File-Trim Design: Built with a heat-treated, surface-hardened steel top face that resists file wear when manually trimming protruding brass flush with a standard flat file.
• Chamber-Dimension Forming: Machined to 7.62x39mm Russian chamber profiles rather than full-length sizing dimensions, preventing unnecessary brass working while setting precise case length.
• Universal Press Threading: Features standard 7/8"-14 threads for compatibility with conventional single-stage, turret, and progressive reloading presses.
• Case Forming Intermediate Step: Facilitates intermediate forming operations when reforming parent brass or wildcatting down into the 7.62x39mm case family prior to final sizing.
• Mechanical Operation: Functions entirely as a non-powered mechanical die requiring no electrical power or motor attachments.

Specifications

• Product: Redding Form & Trim Die
• Manufacturer Part Number (MPN): 83129
• Calibre: 7.62x39mm Russian
• Thread Interface: 7/8"-14 standard reloading press threading
• Compatible Shellholder: Redding #12 shellholder
• Material: Heat-treated, surface-hardened steel
• Typical Weight: Approximately 200–300 g

Who is the Redding 7.62x39 Russian Form & Trim Die for?

• Handloaders reloading 7.62x39mm ammunition on standard presses — Mounts directly into single-stage or turret presses using standard 7/8"-14 threading to manually file-trim 7.62x39mm Russian brass cases to precise length without requiring dedicated electrical case trimmers.
• Reloaders forming custom wildcat cases — Provides an intermediate chamber-dimension forming step to reshape parent brass down to the 7.62x39mm Russian case profile before running brass through final full-length sizing dies.

Less suitable for: Processing volumes exceeding small-to-medium batch sizes where manual single-case file trimming becomes labour- and time-prohibitive; high-volume production handloaders are better served by motorized lathe trimmers or power-driven direct-trim die systems.