RCBS NECK SIZER DIE SETRCBS NECK SIZER DIE SET223 REMINGTONFEATURES: For bottleneck cases to be fired in bolt action rifles only specifically, cases fired out of a specific rifle & neck sized to go back into the same rifle The set consists of a Neck Sizer Die w an Expander Decapping Unit, & a Seater Die w Bullet Seater Plug The Neck Sizer Die resizes the neck only & de primes The included Seater Die has a built in roll crimper to secure the bullet at the same time it's