A combination bullet seating and factory crimp die includes a collet closing die, a crimping collet, a die cap, a seating lock, a bullet depth adjustment screw and a trigger. The crimping collet is inserted into the collet closing die. The trigger is placed in the collet closing die. The bullet depth adjustment screw is threaded into the seating lock. The seating lock is inserted into the die cap. The seating lock includes a sear groove for receiving a C-ring sear. The collet closing die is threaded into the die cap. A bullet seater is retained in the seating lock. In use, a bullet on a mouth of a cartridge case is pushed into the crimping collet. The bullet seater seats the bullet. The trigger pushes the C-ring sear into the sear groove, which allows the mouth of the cartridge to be crimped without moving the bullet.