Hornady's universal shell holders are precision machined from solid steel then heat treated to perform flawlessly for the life of the press. Improvements include a wider mouth and a rounded edge at the opening to allow smoother case insertion. They fit all other Hornady accessories including the Case Trimmer and Hand-Held Priming tool. Hornady shell holders also fit most other brands of reloading presses. This shell holder works with; 17 Remington, 17/222, 17/223, 220VT., 20 Tactical, 204 Ruger, 221 Remington, 222 Remington, 222 Remington Mag., 5.6X50 Mag., 223 Remington, 6mm/223, 6X47 Remington, 6mm TCU., 6.5mm TCU., 7mm TCU., 7mm/223 Ingram, 7X47 Helm, 380 Auto.