The Redding Micro-Adjustable Taper Crimp Die (MPN 31271) is a precision metallic reloading die designed to remove case mouth flare and apply uniform taper crimps to 9mm Luger (9x19mm) and .38 Super ammunition. Machined from hardened steel with an internal hardened steel crimping sleeve, this die threads into standard reloading presses via an industry-standard 7/8"-14 thread pitch. It features a top-mounted knurled micrometer head that allows reloaders to make fine crimp adjustments without loosening the press lock ring or altering the die body position in the toolhead.

Key Features

• Top-Mounted Micrometer Adjustment: Features a calibrated micrometer dial providing approximately ±0.100" (total range ~0.200") of vertical adjustment in distinct 0.001" increments for precise, on-the-fly crimp depth control.
• Reversible Internal Sleeve: Built with a dual-ended, hardened steel internal insert configured to seat and taper crimp 9mm Luger on one side or .38 Super by reversing the sleeve orientation.
• True Taper Crimping: Engineered specifically for straight-wall semi-automatic handgun cartridges that headspace on the case mouth, securing the projectile without altering critical headspace geometry.
• Standard Press Interface: Constructed with a standard 7/8"-14 thread pitch to fit single-stage, turret, and progressive reloading presses.
• Mechanical Operation: Fully manual and mechanical toolhead assembly requiring no electrical power or external connections.

Product Specifications

• Manufacturer Part Number (MPN): 31271
• Die Type: Micrometer adjustable taper crimp die
• Calibre Compatibility: 9mm Luger (9x19mm) and .38 Super
• Adjustment Range: ±0.100" (~0.200" total travel) in 0.001" increments
• Mounting Thread: Standard 7/8"-14
• Material: Hardened steel body with reversible hardened steel crimping sleeve

Who is the Redding 9mm Luger/38 Super Micrometer Adjustable Taper Crimp Die for?

• IPSC and USPSA competitive handgun reloaders — Need precise crimp consistency across mixed brass headstamps, utilising this micrometer adjustable taper crimp die to adjust crimp depth across a ±0.100" range in 0.001" increments directly from the top dial without loosening the die lock ring.
• Service Pistol and Steel Challenge competitors — Require fast, repeatable changeovers between 9mm Luger and .38 Super match loads on progressive presses using a standard 7/8"-14 thread pitch and a reversible internal sleeve to maintain exact case mouth dimensions.

Less suitable for: Handgun reloaders loading larger straight-wall calibres such as .40 S&W, 10mm Auto, or .45 ACP, which require calibre-specific large-bore taper crimp dies; and reloaders processing revolver cartridges like .38 Special or .357 Magnum that require a dedicated roll crimp die or profile crimp die to seat into a cannelure.