What mandrel size and calibre is the Redding 06125 pilot stop designed for?

The Redding 06125 pilot stop is strictly engineered for .25 calibre case necks (.257" bullet class) and requires a standard 3/16-inch (0.1875") shaft or mandrel diameter. It is completely incompatible with sub-calibre 9/64-inch mandrels. This makes it ideal for precision handloaders working with popular cartridges like .25-06 Remington, .257 Roberts, and .25 Creedmoor.

Can I use this pilot stop as a rotary lathe pilot on my Redding case trimmer?

No, this is not a rotary lathe pilot for Redding case trimmers, which instead utilise the 15xxx series trimmer pilots. The Redding 06125 is specifically designed to centre brass cases on concentricity gauges and control deburring depth on compatible 3/16-inch mandrels and flash hole deburring tools.

How does the undercut shape of the pilot stop improve case neck measuring and deburring?

The pilot stop features a distinctive slightly undercut body designed to prevent the tool from catching or binding on minor burrs, dents, or irregular transitions at the case mouth and neck/shoulder junction. This innovative geometry ensures smoother physical operation and delivers more accurate, consistent dial indicator readings when checking runout or neck wall thickness.

Does this manual reloading accessory require any electrical certifications or Australian regulatory approvals?

As a 100% passive and mechanical reloading accessory constructed from precision CNC-machined stainless steel, the Redding 06125 requires no AC or DC power. Therefore, electrical compliance standards such as 240V ratings, Australian plugs, and SAA or RCM regulatory certification marks do not apply to this product.

How should I maintain the stainless steel finish of the Redding 06125 pilot stop on my reloading bench?

The precision-turned stainless steel construction naturally resists corrosion from handling and case cleaning chemicals while preventing galling against brass. To ensure long-term longevity on your Australian reloading bench, simply wipe the pilot clean of residual case lube or debris after use and store it dry in its original packaging.

Redding 06125 Pilot Stop - Redding 06125

The Redding 06125 Stainless Pilot Stop is a precision-machined reloading accessory designed to support .25 calibre (.257" bullet class) cartridge cases on standard 3/16-inch (0.1875") mandrels. It functions as an alignment collar on the Redding Case Neck Concentricity Gauge to facilitate true runout and neck wall thickness measurements, and acts as a positive depth stop on the Redding Universal Flash Hole Deburring Tool. Featuring an undercut pilot stop profile, it prevents binding on minor mouth burrs or neck-shoulder transitions to deliver consistent, non-galling alignment during brass preparation.

Key Features

Precision Alignment: Centres .25 calibre case necks smoothly on concentricity gauge shafts to ensure accurate dial indicator readings without brass binding.
Undercut Body Profile: Features a relief design that clears case mouth imperfections, dents, and irregular neck-to-shoulder junctions.
Stainless Steel Construction: CNC-machined stainless steel build resists corrosion from case cleaning compounds and prevents galling against brass necks.
Flash Hole Deburring Stop: Mounts directly onto 3/16-inch deburring rods to establish a repeatable depth stop inside the case web.
Mechanical Simplicity: Fully manual, non-powered tool designed for standard reloading bench setups.

Specifications

Manufacturer Part Number (MPN): 06125
Calibre Compatibility: .25 Calibre (.257-inch bullet class)
Internal Mandrel Diameter: 3/16 inch (0.1875 inches)
Material: CNC-machined stainless steel
Packaged Dimensions: 114 mm × 77 mm × 11 mm (4.50″ × 3.05″ × 0.45″)
Shipping Weight: 8.5 grams (0.0188 lbs)

Who is the Redding 06125 .25 Caliber Pilot Stop For 3/16 Inch Mandrels for?

Precision .25 Calibre Rifle Reloaders — needing a dedicated .25 calibre (.257" bullet class) alignment stop to control uniform inside-case deburring depth across cartridges like .25-06 Remington, .257 Roberts, .257 Weatherby Magnum, and .25 Creedmoor using this 8.5-gram reloading pilot stop.
Handloaders Measuring Case Neck Runout — requiring exact centering over a standard 3/16-inch (0.1875") mandrel on a Redding Case Neck Concentricity Gauge to measure wall thickness variations without pilot binding.

Less suitable for: Handloaders using sub-calibre 9/64-inch mandrels (.17 to .20 calibre setups) or those needing a rotary lathe trimmer pilot, who require dedicated case trimmer pilots designed specifically for rotary case trimming units.

SKU	RD102331LP
Model #	06125
Brand	Redding
Shipping Weight	0.2000kg

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Redding 06125 Pilot Stop .25 Caliber Stainless Steel

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