Tight tolerances start with precise bullet seating. The ultra micrometer seater die offers alignment, non-crimping function (except .30-30 Cal) and micrometer-based adjustments so you can dial in your load with total accuracy. Incorporates all the well-known features of the original bench rest seater die for straight-line seating, along with an ultra-precise micrometer for adjusting bullet seating depth The micrometer facilitates precise bidirectional adjustments, offering seamless calibration to an accuracy of 0.0005 inches Graduations at increments of 0.001 are clearly marked Reduces the trial and error previously associated with achieving precise round seating The micrometer features bright, white markings that enhance readability