Convert the Uniflow Powder Measure (not included) for use on most four or five-station progressive presses. The Uniflow Powder Measure can have the regular Measuring Screw or the optional Micrometer Adjustment Screw installed, depending on your preference. Three powder bushings are included for most popular rifle and pistol calibers: Small Rifle for .22 through .270 calibers, Large Rifle for 7mm through .45 calibers and Pistol for .32 through .45 calibers. The powder bushings are designed to eliminate powder spillage around the case mouth. Fully adjustable for all of the different variations in case length.