The Redding Precision Expanding Die with 0.2630 Expanding Mandrel is a dedicated reloading tool designed to accurately expand the inside diameter of .264 calibre / 6.5mm cartridge case necks from the inside out. Constructed from CNC-lathe machined, heat-treated alloy steel with a hardened tool steel mandrel, this die standardises neck tension after sizing to achieve uniform bullet release and lower muzzle velocity standard deviations. It features complementary angled alignment mating surfaces between the die body and mandrel to maintain strict concentricity during the expansion stroke.

Key Features

• Internal Neck Expansion: Accurately expands the inside diameter of the case neck from the inside out to produce consistent neck tension across brass lots.
• Self-Centring Alignment: Uses angled alignment mating surfaces secured by a top threaded retention plug and lock ring to minimise neck runout.
• Interchangeable Mandrel Body: The universal die body accepts alternative Redding expanding mandrels covering calibres from .22 up to .338.
• Standard Press Integration: Features industry-standard 7/8"-14 threading to fit single-stage, turret, and progressive reloading presses.

Specifications

• Calibre Suitability: .264 Calibre / 6.5mm (e.g., 6.5 Creedmoor, 6.5 PRC, 6.5x47 Lapua, .260 Remington)
• Included Mandrel Diameter: 0.2630 inches
• Applied Neck Tension: Nominal 0.0010 inches below standard .264" bullet diameter
• Thread Standard: 7/8"-14 reloading press threading
• Die Body Compatibility Range: Accepts Redding mandrels from .22 up to .338 calibre
• Materials: Heat-treated alloy steel die body; hardened, precision-ground tool steel mandrel
• Power Requirements: None (manual mechanical operation)

Who is the Redding Precision Expanding Die W/0.2630 Expanding Mandrel for?

• Precision long-range handloaders — who require a 6.5mm reloading expanding die that applies a precise 0.0010 inch neck tension fit using a dedicated 0.2630 inch mandrel to minimise velocity spreads.
• Benchrest reloaders — who need a 6.5mm reloading expanding die with a self-centring 7/8"-14 threaded system to expand case necks from the inside out while controlling runout on pre-sized brass.
• PRS and NRL competitive shooters — loading cartridges such as 6.5 Creedmoor or 6.5 PRC who depend on a 0.2630 inch mandrel to standardise bullet release pressure across high-volume match ammunition.

Less suitable for: Reloaders seeking a single-step sizing operation directly on fired brass (fired cartridge cases must be full-length resized or neck-sized without an expander ball before using this die), or those requiring neck tension greater than 0.0010 inches (such as 0.0020" or 0.0030"), who instead require alternative standalone mandrels sized to .2620" or .2610", or conventional bushing neck sizing dies.