The precision fitting seating stem is allowed to move well down into the chamber of the die to accomplish early bullet contact. The spring loading of the seating stem provides the positive alignment bias between its tapered nose and the bullet ogive. This spring loading and bullet alignment are maintained as the bullet and cartridge case move upward until the actual seating of the bullet begins. This new Advance Bullet Alignment feature assures you of the straightest possible bullet alignment for handgun and straight wall rifle cartridges. Minimizing bullet run out and improving accuracy. The micrometer adjustment simplifies setting and recording bullet seating depth.