Forget guesswork - seat bullets with scientific precision. The ultra micrometer seater die keeps everything perfectly aligned and uses a non-crimping design (except .30-30 Cal) along with a micrometer to let you control every fraction of an inch. 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