RCBS Little Dandy Powder Rotor #21

The RCBS Little Dandy Powder Rotor #21 (part number 86021) is a fixed-volume metering rotor built for the RCBS Little Dandy Powder Measure, a hand- or bench-operated tool that throws precise smokeless-powder charges by volume rather than by weight. Each of the 28 available rotor numbers meters a different fixed volume, and rotor #21 is one of those interchangeable sizes. Reloaders who load the same recipe over and over rely on a dedicated rotor like this one to skip re-adjusting a powder measure between range sessions. It drops straight into any Little Dandy body without tools.

Key Specifications

• interchangeable with all 28 Little Dandy rotor sizes so it drops into any Little Dandy Powder Measure body without modification.
• meters powder strictly by volume, not by weight giving repeatable charges once a rotor is matched to a load.
• built exclusively for the RCBS Little Dandy Powder Measure and is not a fit for other RCBS or competitor powder measures.
• requires no re-calibration when swapped in or out so changing loads is as fast as changing rotors.
• compatible with standard smokeless reloading powders covering the propellants most bench and progressive reloaders already stock.
• ships at approximately 0.2875 lb light enough that a full set stores easily in a range bag or bench drawer.

Frequently Asked Questions

Do I need to recalibrate the measure after installing this rotor? No. The Little Dandy system is designed so swapping rotor #21 in or out doesn’t require re-zeroing the measure itself.

Can I use rotor #21 with any smokeless powder? It’s designed for standard smokeless reloading powders; consult your load data to confirm rotor #21 throws the correct charge volume for the specific powder and bullet you’re using.

Buy the RCBS Little Dandy Powder Rotor #21

Order Rotor #21 from our Lubbock, TX gun shop and round out your Little Dandy rotor set with fast shipping. We carry the full RCBS reloading equipment lineup for reloaders standardizing on the Little Dandy system.