Abstract: A semi-automatic cartridge reloading machine of the type including a lower travelling platen with a rotatable support for sequentially positioning a plurality of cartridges in each of a series of operating stations and including an upper stationary platen with a plurality of tools or dies depending or extending downwardly and spaced circumferentially about the upper stationary platen and centered over the rotatable support defining a plurality of operating stations is provided with mechanisms for automatically rotating the support to reposition the cartridges in subsequent operating stations at the completion of each reloading step or operation, automatically centering cartridges and removing spent primers from cartridges, automatically belling and admitting powder into cartridges, automatically introducing and inserting new primers into cartridges, automatically introducing and inserting bullets into cartridges, and automatically crimping and seating bullets into cartridges simultaneously and in conjunction