The Forster 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 advantage. The steel weldment and 13a ^2 handle give it unrivaled rigidity and leverage. The addition of ball bearings to the handle improves operation and makes for one of the smoothest reloading experiences ever. If doing something that does not require as much leverage, our Short Handle will adapt into this press. Note Forster is in the process of having 50 BMG Dies available (along with 375 CheyTac, 408 CheyTac, and 375 EnABELR Dies). Their standard shell holder is machined to be .125a ^2 thick (same as all standard shell holders). Most 50 BMG Dies are made to work with thicker shell holders and if used in the press will need to be adjusted accordingly.