The Ultra Micrometer Seater Die is a non-crimping style seater die (except for the 30-30) that ensures perfect alignment between the bullet and case as the bullet is press-fit seated. This precision die holds the bullet and case in perfect alignment, guaranteeing consistency and accuracy with each round. A convenient micrometer allows you to easily adjust the bullet seating depth to your exact specifications. Once the bullet is seated close to the desired depth and measured, simply adjust the micrometer stem up or down to fine-tune the depth, ensuring the cartridge is exactly the length you need for optimal performance and reliability.