The Redding Big Boss Pro-Pak Without Dies is a comprehensive, 100% mechanical single-stage reloading kit engineered for precision handloading. Built around a heavy-duty high-density cast iron O-frame press, the system delivers the physical leverage and mechanical clearance required to reload handgun, standard rifle, and large magnum calibres. Because the entire kit is manually operated, it eliminates electrical requirements, digital drift, and power compatibility concerns, providing reliable measurement and reloading consistency directly on the loading bench.

Key Features

• High-Density Cast Iron Frame: Features an O-frame geometry offset at a 36° angle to enhance workspace visibility and cartridge access during operation.
• Compound Leverage Linkage: High-leverage design paired with a 1.0-inch solid steel ram reduces user effort during full-length case resizing and case forming.
• Versatile Die Compatibility: Accepts 1-1/4″-12 threaded dies directly when the removable steel bushing is removed, or standard 7/8″-14 dies with the bushing installed.
• Smart Primer Arm: Integrated priming system swings automatically into position during ram travel and accommodates small and large primer assemblies.
• All-Mechanical Tool Suite: Includes a magnetically dampened Model 2 mechanical balance-beam scale, heavy-duty powder trickler, case lube kit with Imperial Bio-Green lube, deburring tool, Model 18 case prep accessory handle with brushes, Lexan powder funnel, and a reloading manual.

Specifications

• Frame Opening: 4.5 inches (114.3 mm)
• Ram Stroke: 3.8 inches (96.8 mm)
• Ram Diameter: 1.0-inch solid ram
• Frame Material: High-density cast iron
• Frame Offset: 36°
• Die Thread Size: 1-1/4″-12 (direct fit) / 7/8″-14 (via included adapter bushing)
• Scale Unit: Grains (gn) balance beam
• Mounting: 3-hole bench mounting pattern
• Total Kit Weight: Approximately 25.9 lbs (11.75 kg)

Who is the Redding Big Boss Pro-Pak for?

• Precision rifle handloaders — requires high compound leverage alongside a 4.5 inches frame opening size and 3.8 inches ram stroke to easily size, form, and seat large-capacity magnum cartridges like .300 Win Mag, .338 Lapua Mag, and .375 H&H Mag in a single-stage press.
• Handloaders preferring mechanical balance-beam scales — benefits from the included non-electric Model 2 scale calibrated in grains (gn) paired with a solid 1.0-inch ram press, avoiding digital sensor drift and power requirements entirely.

Less suitable for: Ultra-large 50-calibre cartridges (such as .50 BMG) where standard presses lack the window height and structural clearance, requiring dedicated ultra-large calibre presses; or high-volume shooters loading hundreds of rounds per hour where a progressive reloading press is better suited than a 50–100 round-per-hour single-stage setup.