The Ultra Micrometer Seater Die is a non-crimping style seater die (except for the 30-30) designed to hold the bullet and case in perfect alignment during the press-fit seating process. This ensures precise, consistent bullet seating for every round. Equipped with a convenient micrometer, it allows you to easily adjust the bullet seating depth to your exact specifications. After seating the bullet close to the desired depth, simply measure it and adjust the micrometer stem up or down to fine-tune the depth. This guarantees that each cartridge will be seated to the exact length you need for optimal performance and reliability.