What powder measure models and drop tubes are compatible with the Redding 03817 adapter?

The adapter is engineered to fit all standard Redding powder measure drop tubes manufactured from the 1960s to the present, including the 3BR, Match Grade, and Competition series, as well as the Redding Powder Funnel. It features a tool-less friction slip-fit design that slides directly over the existing tube. Please note that compatibility with non-Redding brands like RCBS or Hornady is not guaranteed.

Which specific cartridge calibres is this adapter designed to handle?

The Redding 03817 adapter is strictly optimised for sub-twenty calibre reloading, specifically ranging from .17 to .20 calibre cases such as the .17 Remington, .17 Hornet, .17 Fireball, and .204 Ruger. For standard cartridges ranging from .22 calibre through .30 calibre, you should use standard Redding factory drop tubes or the Redding #03814 drop tube extension instead.

What material is the Redding 03817 made from, and does it allow me to monitor powder flow?

This adapter is constructed from durable clear Lexan polycarbonate. The transparent material allows reloaders to visually inspect powder flow in real-time, helping you easily identify and clear potential static cling or powder bridging issues before charges reach the cartridge case.

Does this mechanical reloading accessory require any electrical safety certifications for use in Australia?

No electrical compliance or regulatory certifications are required for the Redding 03817. Because it is a 100% mechanical, unpowered passive accessory, considerations such as 240V compatibility, Australian plugs, and SAA or RCM electrical certifications do not apply.

Redding 03817 Adapter - Redding 03817

The Redding 17 & 20 Caliber Drop Tube Adapter (MPN: 03817) is a dedicated reloading accessory designed to reduce the exit diameter of standard Redding powder measures and powder funnels. Constructed from clear Lexan polycarbonate, this adapter sleeves over existing drop tubes to cleanly funnel propellant into small-diameter case mouths without spillage, overflow, or powder bridging outside the neck. It attaches via a friction slip-fit mechanism requiring no tools or disassembly, and it is compatible with all standard Redding Powder Measures—including the 3BR, Match Grade, and Competition series—manufactured from the 1960s to the present.

Key Features

Sub-.22 Calibre Funnelling: Narrows the powder charge path to interface directly with .17 and .20 calibre cartridge case mouths such as .17 Hornet, .17 Remington, .17 Fireball, and .204 Ruger.
Friction Slip-Fit Design: Installs and removes by sliding directly over standard Redding drop tubes and funnels without requiring threading or mechanical tools.
Clear Lexan Construction: Transparent polycarbonate body allows continuous visual inspection of propellant flow to identify static cling or powder bridging during charging.
Passive Operation: Fully mechanical accessory with zero power or electrical requirements.

Specifications

Brand: Redding Reloading Equipment
Manufacturer Part Number (MPN): 03817
Material: Clear Lexan polycarbonate
Attachment Interface: Tool-less friction slip-fit
Calibre Compatibility: Strictly optimised for .17 to .20 calibre
Hardware Compatibility: Standard Redding Powder Measures (1960s to present) and Redding Powder Funnels

Who is the Redding 17-20 Caliber Drop Tube Adapter for?

Varmint hunters reloading .17 Remington and .204 Ruger cartridges — requires a dedicated drop tube adapter optimised strictly for calibres ranging from .17 to .20 calibre to prevent propellant spillage across small-diameter case mouths during high-volume pest control ammunition preparation.
Precision handloaders loading sub-.22 calibre rifle ammunition — relies on a drop tube adapter that restricts the powder dispensing aperture to the .17 to .20 calibre range while providing transparent visual confirmation of consistent powder flow into narrow cartridge necks.

Less suitable for: Cartridges measuring .22 calibre through .30 calibre, which exceed the sub-calibre diameter of this reducer and should use standard factory drop tubes or drop tube extensions; and .50 calibre cartridges, which require a dedicated large-calibre powder drop tube adapter.

SKU	RD41417LP
Model #	03817
Brand	Redding
Shipping Weight	1.0000kg

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Redding 03817 Drop Tube Adapter 17 20 Caliber Lexan

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