Quote: 7 mm Mauser (less Paraguay where the service cartridge and Mauser were also the 7,65x53, as well as Bolivia and Perú)
Paraguay used both cartridges. Though most of their military rifles, models of 1907, 1927, M24/30, Standard model 1933, were in 7.65x53, both their first modern rifle, a M95 Mauser, and the small number of Haenel M1909, were in 7x57.