Description
The RCBS Uniflow-III is the latest and most refined version of a powder measure that's been a reloading bench staple for decades. RCBS machined the reference surfaces to exacting tolerances so powder pours uniformly out of the metering cylinder and drops into the case the same way every single pull. That kind of repeatability is what separates a good measure from a frustrating one, and it covers a wide span of charges from 0.5 all the way up to 95 grains with 0.1 to 0.3 grain accuracy.
What Sets the Uniflow-III Apart
The big upgrade here is versatility. Earlier Uniflow measures often meant swapping rotors and cylinders when you jumped between small pistol charges and heavier rifle loads. The Uniflow-III uses a single metering cylinder and rotor that handles the whole range, so a reloader running 9mm one day and a .30 caliber rifle the next doesn't need extra parts on the bench. It handles the three major powder types too, including ball, extruded, and flake.
Hopper and Cleaning on the Uniflow-III
The hopper is NG-resistant and anti-static, which keeps fine grains from clinging to the walls and throwing off your flow. It holds a solid amount of powder for long sessions, and the threaded design is the real convenience feature. When it's time to change powders or clean up, the hopper simply unscrews so you can empty and wipe everything down in a couple of minutes instead of fighting with it.
One thing worth knowing: this is a volumetric throw-and-check measure, not a dispenser that weighs for you. RCBS recommends pairing it with a good scale to set your initial charge and spot check as you go, which is standard practice for any manual measure. It mounts to a bench with a standard 7/8-14 thread and comes backed by the RCBS limited lifetime warranty. For handloaders who like the feel and speed of throwing charges by hand, this is about as consistent as a mechanical measure gets without jumping to a digital dispenser. Note that it is built for modern smokeless powders and is not intended for black powder.
Key Specifications
- Manufacturer: RCBS
- Model: Uniflow-III (UPM-III)
- Manufacturer Part Number: 9016
- UPC: 604544621181
- Type: Manual Volumetric Powder Measure
- Charge Range: 0.5 to 95 grains
- Accuracy: 0.1 to 0.3 grain
- Hopper Capacity: Half pound extruded / one-third pound flake powder
- Hopper Material: NG-resistant, anti-static, threaded
- Compatible Powder Types: Ball, extruded (cylindrical), and flake
- Mounting Thread: 7/8 inch – 14
- Rifle & Pistol: Single metering cylinder and rotor for both
- Length: 12.25 inches
- Warranty: RCBS Limited Lifetime
- Made In: USA
What’s Included
- RCBS Uniflow-III Powder Measure assembly
- Metering cylinder and rotor (rifle and pistol capable)
- Powder hopper
- Stand plate
- Two drop tubes
- Instruction manual
Frequently Asked Questions
Does the Uniflow-III need a separate rotor for pistol and rifle charges?
No. One of the standout upgrades on the Uniflow-III is that a single metering cylinder and rotor covers the full 0.5 to 95 grain range. That means you can load light pistol charges and heavier rifle charges without swapping out any extra parts.
Does the RCBS Uniflow-III weigh charges for me?
It does not. The Uniflow-III is a mechanical, volumetric measure that throws charges by volume rather than weight. RCBS recommends using it alongside an accurate powder scale to set your original charge and to spot check throws during a loading run.
How does the Uniflow-III mount to a reloading bench?
It uses a standard 7/8-14 thread and comes with a stand plate, so it bolts right onto most reloading benches. That common thread size also means it works with aftermarket powder measure stands if you want to raise it up for better clearance under the drop tube.
Can I use the Uniflow-III with black powder?
No, it is designed for modern smokeless powders only and is not intended for black powder. It handles ball, extruded, and flake smokeless powders, and the NG-resistant anti-static hopper helps those fine grains flow smoothly instead of clinging to the walls.





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