Abstract: A loader for a magazine having an upper open end, a lower closed end, a forward vertical side edge and a rear vertical flat side edge, loader having a vertical channel for receiving therein the rear flat edge of the cartridge, the channel being formed by a pair of flat vertical side members spaced apart in parallel relation and having a rear flat edge where it slidably engages the rear flat edge of the magazine, the magazine being made of ferrous metal and the loader being made of non-ferrous material. A vertically extending tab is mounted in the upper portion of the channel and is provided with a downwardly vertically extending plunger mounted at the lower end of the tab for engaging the edge of an uppermost bullet mounted within the magazine.