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 348 Winchester, 10.3x60, 500 Linebaugh, 50 Alaskan.