The Lyman 7701028 Pro Die Pack for 300 Blackout is a complete reloading die set engineered for precision and durability across single-stage, turret, and progressive presses—including Lyman's Mark 7 and standard progressive platforms. Whether you're loading for a subsonic bolt gun, AR pistol, or precision rifle, this die pack delivers the consistency and wear resistance that serious 300 Blackout reloaders demand. Built from stainless steel for corrosion resistance and longevity, these dies combine carbide technology with Lyman's proven micrometer seating and crimping systems to help you achieve tight case-to-bullet concentricity and reliable ammunition.

The sizing die features a polished carbide ring that reduces resizing effort and resists wear through thousands of rounds—a real advantage when you're processing high volumes of brass. The springloaded decapping rod system ensures primers are cleanly ejected on every stroke, keeping your setup running smoothly and your primer pockets clear. Lyman's two-step neck expander (M die) gives you precise control over neck tension and case mouth flare, critical for consistent bullet seating and crimping in a cartridge where concentricity directly affects accuracy and reliability.

The micrometer seating die is the star here: its floating punch centers the bullet in the case and minimizes runout, while the micrometer adjustment lets you dial in exact seating depth without guessing. The matching micrometer taper crimp die removes case mouth flare and locks bullets in place with repeatability. This is the setup you reach for when you want ammunition that feeds reliably and groups tight, and you're willing to dial in your dies properly to get there. If you're building subsonic or supers for precision or hunting, this die pack is built to keep up.

The Lyman 7701028 Pro Die Pack for 300 Blackout is a complete reloading die set engineered for precision and durability across single-stage, turret, and progressive presses—including Lyman's Mark 7 and standard progressive platforms. Whether you're loading for a subsonic bolt gun, AR pistol, or precision rifle, this die pack delivers the consistency and wear resistance that serious 300 Blackout reloaders demand. Built from stainless steel for corrosion resistance and longevity, these dies combine carbide technology with Lyman's proven micrometer seating and crimping systems to help you achieve tight case-to-bullet concentricity and reliable ammunition.

The sizing die features a polished carbide ring that reduces resizing effort and resists wear through thousands of rounds—a real advantage when you're processing high volumes of brass. The springloaded decapping rod system ensures primers are cleanly ejected on every stroke, keeping your setup running smoothly and your primer pockets clear. Lyman's two-step neck expander (M die) gives you precise control over neck tension and case mouth flare, critical for consistent bullet seating and crimping in a cartridge where concentricity directly affects accuracy and reliability.

The micrometer seating die is the star here: its floating punch centers the bullet in the case and minimizes runout, while the micrometer adjustment lets you dial in exact seating depth without guessing. The matching micrometer taper crimp die removes case mouth flare and locks bullets in place with repeatability. This is the setup you reach for when you want ammunition that feeds reliably and groups tight, and you're willing to dial in your dies properly to get there. If you're building subsonic or supers for precision or hunting, this die pack is built to keep up.