The Redding Case Neck Gauge is a mechanical benchtop inspection tool designed to measure cartridge case neck wall thickness and check for runout before or after neck turning and resizing. Constructed with a CNC-machined green aluminium base, the gauge mounts directly to a reloading workbench using two screws or an optional bench C-clamp. It provides precise neck uniformity readings via an integrated analogue dial indicator, allowing handloaders to eliminate inconsistent brass cases and achieve uniform bullet release.

Key Features

• Precision Dial Readout: Calibrated dial indicator features 0.001" graduation increments for measuring neck wall thickness variations and neck runout.
• Wide Calibre Range: Accommodates cartridge cases from .17 calibre up to .338 calibre using two interchangeable mandrels.
• Dual-Ended Mandrel Pins: Mandrels incorporate dual alignment pins, including a 0.060" small alignment pin designed specifically for small flash hole brass such as PPC and BR cases, alongside standard flash hole pins.
• Included Out-of-the-Box Setup: Supplied with a small mandrel (.17 to .20 calibre), a large mandrel (.22 to .338 calibre), and two stainless pilot stops (.22 calibre and .30 calibre).
• Mechanical Operation: Fully analogue design requires no electrical connections or batteries for static reloading bench use.

Specifications

• Calibre Capacity: .17 calibre to .338 calibre
• Measurement Increments: 0.001"
• Flash Hole Compatibility: Standard flash holes down to 0.060"
• Included Pilot Stops: .22 calibre and .30 calibre
• Construction: CNC-machined aluminium base with steel mandrels and dial indicator
• Shipping Weight: ~478 g (~1.055 lbs)

Who is the Redding Case Neck Gauge for?

• Competitive benchrest and long-range target shooters — sorts cartridge brass across calibres from .17 calibre up to .338 calibre by reading thickness variations on a dial calibrated in 0.001" graduation increments, helping handloaders minimise velocity standard deviations.
• Precision handloaders performing case neck turning — verifies brass consistency and small flash hole brass alignment using mandrels fitted with 0.060" small alignment pins to inspect case neck wall uniformity before and after turning operations.

Less suitable for: Cartridges exceeding .338 calibre (such as .375 or .50 BMG) which surpass the mandrel dimensions, or for measuring loaded ammunition bullet-to-case alignment, which requires a dedicated runout and concentricity gauge rather than a case neck thickness gauge.