The Competition Powder Measure starts with the proven Uniflow Powder Measure with its precision ground metering drum and honed main casting. RCBS then added a powder baffle and UPM Micrometer Adjustment screw. The Powder Baffle controls the powder flow and the pressure of the powder column on the metering unit. The UPM Micrometer Adjustment screw allows precise adjustments to the metered charge as well as allowing you to record the number for future reference and reuse. Handle placement can be used on the right or left side simply by changing the orientation of the metering drum. The powder measure will accurately meter, by volume, all types of smokeless powder?ball, flake or cylindrical (stick). The Rifle unit meters volumetric powder charges from 10-110 grains. The Pistol/Small Rifle unit meters volumetric powder charges from .5 to 40 grains. The Combo unit includes both the Rifle and Pistol metering drums and complete UPM Micrometer Adjustment screw assemblies. Note: All powder measures should be used in conjunction with an accurate powder scale to set the desired charge and to occasionally check charges during the reloading process. Piggyback Stand (#10-9035, not included). NOTE: Do NOT use with black powder!