The Redding Match-Grade Model 3BR Powder Measure with Both Chambers (MPN 03700) is a mechanical, bench-mounted volumetric dispenser engineered for precision handloading. Built around a hand-honed cast iron frame and a hard chromium-plated steel metering drum, this manual powder measure dispenses uniform charges of extruded, ball, or flake smokeless propellant without requiring electrical power. It features a clear polymer reservoir with an approximate 1 lb (0.45 kg) capacity and an internal adjustable powder baffle that maintains uniform column pressure over the drum. The standard drop tube fits .22 to .50 calibre case necks, and the included bench-front mounting bracket secures the unit directly to a reloading bench.

Key Features

• Dual Micrometer Metering Chambers: Supplied with both the Universal Rifle micrometer unit and the Handgun/Pistol micrometer unit, enabling quick reconfiguration between rifle and pistol charge ranges.
• Zero-Backlash Micrometer Adjustment: Positive-lock indexing mechanism eliminates thread play, allowing handloaders to record and return to precise volumetric settings for specific recipes.
• Internal Powder Baffle: Sliding baffle ensures consistent powder density at the metering chamber regardless of reservoir fill level.
• Cast Iron & Hard Chrome Construction: Precision-machined, hand-honed frame and chrome-plated drum resist wear and ensure smooth manual lever operation.

Specifications

• Manufacturer Part Number (MPN): 03700
• Pistol Chamber Capacity: 0.5 to 10 grains
• Universal Chamber Capacity: 5 to 100 grains
• Powder Reservoir Capacity: Approximately 1 lb (0.45 kg)
• Calibre Compatibility: .22 to .50 calibre case necks (standard drop tube)
• Mounting: Unthreaded bench-front mounting bracket (also fits 7/8"-14 press stations via optional adapters)
• Propellant Compatibility: Smokeless powders (extruded, ball, flake)
• Operation: 100% mechanical manual lever (no electrical power required)
• Shipping Weight: 1.36 kg to 1.57 kg
• Package Dimensions: 25.4 cm × 15.2 cm × 7.6 cm

Who is the Redding Match Grade Powder Measure With Both Chambers for?

• Precision rifle handloaders — provides a dedicated Universal micrometer chamber capable of repeatable volumetric throws across a 5 to 100 grain range directly into .22 to .50 calibre case necks using this benchrest powder measure.
• Handgun reloaders — utilizes the interchangeable pistol micrometer chamber designed for fine-increment volumetric dispensing between 0.5 and 10 grains of smokeless powder.
• Benchrest shooters — relies on the zero-backlash micrometer mechanism and internal powder baffle of this benchrest powder measure to record exact numerical settings and eliminate charge weight variation.

Less suitable for: Handloaders dispensing black powder (which presents static and spark hazards in cast/steel assemblies) or loading large-capacity magnum calibres exceeding 100 grains per charge; these applications require a dedicated non-sparking black powder measure or a large-bore, ultra-capacity powder measure to avoid double-throwing.