Well, for the German 7.9 mm there are primarily two bullets possible:
1 - the original “schweres Spitzgeschoss” (sS) with a lead core: 12.8 g as adopted in 1930
2 - the “Spitzgeschoss mit Eisenkern” (SmE) which had a soft steel core to save lead. The majority of German 7.9 mm manufactured during WW2 were of this type: 11.55 g nominal weight.
Both have a boattail, sS being 35.3 mm long, SmE 37.3 mm (both nominal, many bullets are up to 0.3 mm shorter). Cartridges of the sS type have a green primer annulus, the SmE have a blue annulus.
P.S. 7.92 mm is the Czechoslovak designation for this caliber; in Germany it was 7.9 mm. Mauser had nothing to do with its development. It originated in state arsenals.