Product Overview

Take control of neck tension with the Redding Precision Expanding Die with 0.2230" mandrel – a purpose-built tool for serious handloaders chasing consistent, concentric ammunition. Used in a standard reloading press, this die lets you precisely expand case necks for .22 calibre cartridges such as .223 Remington, .22-250 Remington and .220 Swift. The hardened steel mandrel is ground to a true 0.2230" diameter, giving you predictable, repeatable neck I.D. so bullets seat straighter and grip more consistently from batch to batch.

Machined on CNC lathes and heat-treated for long-term dimensional stability, the die body and mandrel feature angled alignment surfaces that lock together square when tightened with the retention plug and lock ring. That means less runout, better concentricity and more uniform release of the bullet at ignition – all of which translate to tighter groups on target. Whether you’re fine-tuning a match load or building dependable hunting ammo, this Redding Precision Expanding Die delivers the control and repeatability you need to get the best from your rifle and your brass.

Key Features

• Dedicated precision expanding die body with 0.2230" mandrel gives consistent neck tension for more uniform bullet seating and improved accuracy.
• CNC-machined die body and mandrel, then heat-treated and precision-ground, deliver long-term dimensional stability and durability under regular reloading use.
• Angled alignment surfaces between die body and mandrel promote concentric case neck expansion, helping reduce runout and enhance overall cartridge consistency.
• Threaded retention plug and lock ring securely hold the mandrel in position, maintaining repeatable settings from session to session.
• High-quality tool steel mandrel, hardened and ground to final size, resists wear and maintains its exact 0.2230" diameter over thousands of cycles.
• Mandrel size is clearly marked on the head, allowing quick identification and easy selection when swapping between different neck tension setups.
• Available mandrel diameters in 0.0005" increments below bullet diameter let handloaders fine-tune neck tension to suit specific rifles, bullets, and applications.
• Factory-assembled with a mandrel 0.0010" below nominal bullet diameter for .22 calibre, providing an ideal starting point for most precision .223 and .22 centre-fire loads.
• Compatible with a wide range of .22 calibre cartridges, including .223 Remington, .22-250 Remington and .220 Swift, making it a versatile tool for multi-calibre reloaders.
• Designed for use in a standard reloading press, offering manual, press-operated control over case neck expansion without the need for power tools.