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The RCBS Little Dandy Rotor #0 is a drop-in, fixed-charge rotor made for the Little Dandy Pistol Powder Measure. It's one of the smaller rotors in the family, designed for the lightest charge weights, which makes it a go-to for reduced pistol loads and small-caliber rifle work. Swap it into your measure and there's no fiddling with micrometers or adjustment screws. The charge is set by the machined volume of the rotor itself, so once you've dialed in a load, you get the same throw every single time.
The Little Dandy system runs on 28 interchangeable rotors numbered from 00 up through 26, and each one throws a different fixed volume. The 00 and 0 were brought in for the really tiny charges, so the #0 is where you'll land when you need a small, precise drop that bigger rotors can't give you. RCBS publishes a rotor chart that pairs each number with popular powders and their approximate charge weights, which is the best starting point for figuring out if the #0 lines up with what you're loading.
Here's the real-world tip every experienced handloader will tell you: treat the chart as a ballpark and always verify with a scale. The way folks do it is throw ten charges onto the pan, weigh them, then move the decimal to get your average per-charge weight. The rotors tend to run right on the stated weight or a touch under, rarely over, so it's a safe way to confirm before you commit to a batch. Once you've checked it against a trusted scale, the consistency is excellent, and many people leave a rotor set up or tuck it into the die box for that caliber.
Each rotor is machined from steel to deliver a repeatable volumetric charge, and it works with pretty much any smokeless powder you'd run through a Little Dandy. You can use the measure by hand moving case to case in a loading block, or mount it on the optional powder measure stand for bench work. For small-batch pistol and reduced rifle loads, this little rotor earns its keep.
The #0 rotor is made specifically for the RCBS Little Dandy Pistol Powder Measure. It drops right in with no adjustment needed after changeover. All 28 Little Dandy rotors are interchangeable, so you can swap between them as your loads change.
The chart is a solid starting guide, but it's best to treat it as a ballpark and verify on your own scale. Most handloaders find the rotors throw right on the stated weight or just slightly under, rarely over. A good habit is dropping ten charges, weighing the total, and dividing by ten to confirm your exact charge.
The 00 and 0 rotors were added for the smallest charge weights in the lineup. If you're loading light pistol charges or reduced small-caliber rifle loads, the #0 gives you a small, repeatable drop that the larger rotors can't. Check the RCBS rotor chart against your powder and target charge to confirm it's the right pick.
Once you've verified a rotor against your scale, it throws the same volume charge every time, which is the whole appeal of a fixed-charge system. Keep in mind that different lots of the same powder can weigh slightly differently for the same volume, so it's worth a quick recheck when you open a new can. Charges can also run a touch light when the powder reservoir gets very low.
| UPC | 076683860354 |
|---|---|
| Manufacturer | |
| Manufacturer Part Number | 86035 |
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