The Co-Ax XL is made to accept 1a ^2 1/4a ^2 Dies as well as 7/8a ^2 dies (adaptor lock ring required (2) included with the press). The Press was designed with ELR Shooters in mind and is built with the same float advantage, quick die change and precision of the standard Co-Ax. What is different: Accepts both 1 1/4a ^2 and 7/8a ^2 Dies Made from a steel weldment as opposed to Cast Iron Accepts a wider range of calibers No priming system A light has been added Ball bearings in the handle-frame connection What is the same: Spent primer catch system Quick die change Floating jaw system Mechanical advant Mfg: Forster