Hornady Match Grade Die FL 280 Ackley Imp (.284) is designed for ultra-precise alignment and match-winning performance from your press, youll want Hornadys Match Grade Dimension Dies. The neck size die features interchangeable, self-centering neck size bushings that eliminate the chance of oversizing your case necks and overworking the brass. Featuring interchangeable neck sizing bushings. Select the bushing your cartridge requires to complete your Match Grade Die. Available in full length size.