The shell holder adapter plate enables the use of standard shell holders as a substitute for the spring-loaded, universal shell holder jaws included with the Co-Ax press. It is user-friendly and enhances the reloading process for certain non-standard cartridges. Users are required to provide their conventional-style shell holder to use in conjunction with this adapter. Facilitates the seamless reloading of non-standard cartridges with enhanced efficiency and precision High alloy steel