The RCBS Little Dandy Pistol Powder Measure is the perfect handheld powder measure for handloaders looking for a small and convenient volumetric powder measure for handloading pistols and select small-caliber rifles. These rotors are specific to a particular powder charge.The Little Dandy Pistol Powder Measure is perfect for handloading pistol shooters and select small-caliber rifle shooters. Each rotor for the little dandy is meticulously machined out of steel to deliver a consistent volumetric charge. Once a rotor is changed over there is no readjustment necessary. Please review their powder rotor charge table to help determine the correct rotor for your application. Not for use with Black Powder Precision Machined Rotor for tight fit and accurate powder charges Great for handgun shooters and select small-caliber rifle shooters Fixed Charge weight rotor Over 13 different load combinations