The Redding Drop Tube Extension (Model 03818) is a dedicated reloading accessory engineered to increase the drop height of propellant during the case-charging process. By adding 4-1/2 inches (approximately 114.3 mm) of vertical fall, the extension increases the kinetic energy and velocity of falling powder granules. This allows coarse, extruded, and long stick powders to self-settle and stack more densely inside the cartridge case, maximising usable case capacity, preventing bridging, and eliminating the need to physically crunch powder charges.

Key Features

• Enhanced Powder Stacking: Adds 4-1/2 inches of vertical drop distance to settle bulky or extruded propellants naturally into the case.
• Durable Lexan Construction: Moulded from transparent green Lexan polymer for visual monitoring of powder flow and long-term durability.
• Tool-Free Attachment: Utilises a friction slip-fit design that mounts directly over existing factory drop tubes and transparent green Lexan funnels.
• Broad Powder Measure Compatibility: Integrates directly with current Redding powder measures, including the Match-Grade 3BR and Competition 10X models.
• Manual Operation: Purely mechanical reloading component weighing approximately 31 to 32 grams (0.068 to 0.07 lbs) with no electrical power requirements.

Specifications

• Manufacturer Model: 03818
• Overall Length: 4-1/2 inches (114.3 mm)
• Total Weight: Approximately 31–32 grams (0.068–0.07 lbs)
• Material: Transparent green Lexan polymer
• Mounting Interface: Slip-fit over standard Redding drop tubes and funnels
• Primary Calibre Compatibility: .22 to .30 calibre (up to .45 calibre with wide-mouth configurations)

Who is the Redding Drop Tube Extension for?

• Precision Long-Range Handloaders — who require maximum charge density and uniform powder column stacking across .22 to .30 calibre rifle cases using a 4-1/2-inch drop tube extension to prevent extruded powder bridging.
• Benchrest and F-Class Target Shooters — who utilise full-case capacity loads and rely on a lightweight 31 to 32-gram reloading powder measure drop tube extension to settle propellant granules without mechanical compression or powder spillage.

Less suitable for: Handloaders charging sub-calibre cases ranging from .17 to .20 calibre, who instead require a dedicated small-calibre drop tube adapter.