An apparatus for loading cartridges into a pistol magazine comprises a main unit with a magazine holder having an opening configured to receive a pistol magazine with a first long axis and a tray having an elongate channel configured to arrange a stack of cartridges along a second long axis laterally offset from the first long axis. An angled wall extends across the elongate channel toward the opening at a non-zero angle relative to the second long axis. A sleeve covers the cartridges in the main unit, and a handle is movable relative to the main unit to cause the cartridges to be pushed into the magazine. Moving the handle is continued to cause each of the cartridges in succession to be tilted by the angled wall and loaded via the opening into the pistol magazine along the first long axis.