Features dead length bullet seating with smooth, accurate adjustment. Tests prove sliding bullet guides provide cartridges with the least bullet runout. When used as a dead length bullet seating die, the body contacts the shell holder assuring precise uniform seating depth. Laser engraved micrometer thimble and body is easy to read with divisions representing one thousandth of an inch, reads just like a precision depth micrometer. Infinitely adjustable, providing precision bullet seating depth.