The Ultra Micrometer Seater Die is a non-crimping seater die (except for the 30-30) that ensures perfect alignment between the bullet and case as the bullet is press-fit seated. This precise alignment guarantees consistent and accurate seating with every use. A built-in micrometer allows you to easily set the bullet seating depth to your exact specifications. After seating your bullet close to the desired depth and measuring it, simply adjust the micrometer stem up or down to achieve the perfect cartridge length. This die ensures that each round is precisely the length you need for optimal performance and reliability.