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; 30/378 Weatherby Mag., 33 Winchester, 338/378 Weatherby Mag., 378 Weatherby Mag., 416 Weatherby Mag., 460 Weatherby Mag., 45/70 Government, 480 Ruger/475 Linebaugh.