The RCBS MatchMaster Competition Seating Die (25 Creedmoor, Part #23740) is an elite, micrometer-adjustable bullet seating die designed for precision handloading. Exclusive Bullet Loading Window: Features a unique window that allows you to drop the bullet directly into the die, freeing up your hands and speeding up the reloading process. Oversized Micrometer: Allows for highly precise seating depth adjustments in increments of 0.001". Free-Floating, Self-Centering Stem: Aligns the bullet perfectly with the case, drastically minimizing bullet run-out and ensuring absolute concentricity. Bullet Retention System: Holds the bullet securely in place while the press is run, eliminating the risk of misaligned seating. Standard 7/8"-14 Thread: Compatible with almost all standard reloading presses on the market.