The Ultra Micrometer Seater Die is a non-crimping style die (except for the 30-30) that ensures perfect alignment of the bullet and case during the press-fit seating process. This alignment guarantees precise and consistent bullet seating. The die features a convenient micrometer that allows you to easily set the bullet seating depth to your exact specifications. After initially seating the bullet close to the desired depth and measuring it, simply adjust the micrometer stem up or down to fine-tune the seating depth. This ensures that each cartridge will be seated to the exact length needed for optimal performance and precision.