The Accu-Ring is a sizing/seater die lock-ring which provides reference marks in increments of thousandths of an inch (0.001”).
Notice: The distance of 0.001” is the distance between a long and short reference mark as shown in Picture 3. This distance indicates the up or down adjustment of the die in the Co-Ax® Reloading Press. Actual up or down movement of the die is 0.000998” per reference mark, which, for all intents and purposes, is one thousandth of an inch (0.001”).