As VdoMemorie suggests, if you are using multiple size sizer dies, that are significantly different in diameter, you will have to make up appropriate push through rams. Getting maximum contact with the edges of the slug bases avoids slug damage in sizing. I got away with only two. One for the .723 and .730 dies for the foster type slugs, and another smaller ram for the .673 and .679 dies used for the Lee Key Drives.