The Uniflow Powder Measure will perform two powder charging tasks in one fast, simple operation. With each turn of the handle it accurately measures powder within a fraction of a grain & swftly dispenses it into cases, one after another. Powder pours uniformly from the powder hopper into the measuring cylinder, through the drop tube & into the case. You can change from one charge to another quickly & easily withe numbered measuring screw which also serves as a reference for future charges. The powder level is visible at all time through a large capacity five inch plastic powder hopper. WARNING: NOT for use with Black Powder.