The .308 Winchester Ultra Micrometer Seater Die is a precision non-crimping seater die that holds bullets and cases in perfect alignment for accurate press-fit seating. The integrated micrometer allows precise bullet seating depth adjustment to your exact specifications..308 Winchester Ultra Micrometer Seater DieUltra-accurate micrometer adjustable to .0005 inchesGradations clearly marked at .001 inch incrementsNon-crimping design for straight-line seatingBright white markings for easy readingFine-tuning capability in both directionsEliminates trial and error in bullet seatingPerfect for precision reloaders seeking consistent cartridge overall length and enhanced accuracy. Features all the benefits of bench rest seating dies with advanced micrometer control for professional-grade ammunition preparation.