Redding must live you you guys. There are a dozen factors that will influence accuracy other than the dies. As a micrometer seater: They are OK to have but if you take the seating stem of your current set and count the thread pitch (number of threads per inch) you can do the math and determine how much depth you gain per turn of the seater. Once you know that it's pretty easy to accurately determine adjustments of seating depth. It takes about 5 minutes, a 1" rule, and a pocket calculator but it's not that hard.~Muir