Method for casting cast parts from a molten metal using - a casting mould pivotably mounted about a horizontally aligned pivot axis in a casting machine, the casting mould defining a mould cavity shaping the cast part to be cast in each case and having - a lid delimiting the mould cavity on its one side, on which at least one filling opening is provided for feeding molten metal into the mould cavity, - a reference side wall abutting on the lid and delimiting the mould cavity on its one side with wall areas, into which a main plane of the reference side wall running axially parallel to the pivot axis is placed in such a way that its alignment is approximated to the average of the alignments of the wall areas, which also in each case extend in a direction aligned parallel to the pivot axis, and - a bottom whose bottom areas assigned to the mould cavity shape the bottom end of the cast part, and using - a tundish which on its pouring-in side for pouring the molten metal into the tundish and on a pouring-out side abutting on the pouring-in side and on a bottom of the tundish is at least in sections open in each case, via which the molten metal filled into the tundish in casting operation flows out of the tundish into the casting mould, wherein: - the tundish is arranged on the casting mould in such a way that its pouring-out side butts against the lid of the casting mould and the bottom of the tundish is assigned to the reference side wall, wherein the pouring-in opening of the casting mould and the open section of the pouring-out side at least overlap one another, characterised by the following production steps: - pivoting the casting mould into a pouring-in position, in which the main plane of the reference side wall encloses an angle β1 that is less than 180° with the bath level of a molten metal portion to be filled into the tundish and the bath level of the molten metal portion to be filled into the tundish is located below the filling opening of the casting mould; - filling the tundish, which is in the pouring-in position, with the molten metal portion which is sufficient for filling the casting mould; and - pivoting the casting mould with the tundish arranged on it about the pivot axis into a pivot direction, in which as a result of the pivoting molten metal flows out of the tundish into the casting mould, wherein the pivoting is continued until an end position is reached, in which the casting mould is filled with molten metal, and wherein the angle β1 enclosed in each case between the main plane of the reference side wall and the bath level of the molten metal portion, which is contained in the tundish in each case, is at least constantly less than 180° until the melt flowing into the casting mould hits the bottom of the casting mould. - a casting mould pivotably mounted about a horizontally aligned pivot axis in a casting machine, the casting mould defining a mould cavity shaping the cast part to be cast in each case and having - a lid delimiting the mould cavity on its one side, on which at least one filling opening is provided for feeding molten metal into the mould cavity, - a reference side wall abutting on the lid and delimiting the mould cavity on its one side with wall areas, into which a main plane of the reference side wall running axially parallel to the pivot axis is placed in such a way that its alignment is approximated to the average of the alignments of the wall areas, which also in each case extend in a direction aligned parallel to the pivot axis, and - a bottom whose bottom areas assigned to the mould cavity shape the bottom end of the cast part, and using - a tundish which on its pouring-in side for pouring the molten metal into the tundish and on a pouring-out side abutting on the pouring-in side and on a bottom of the tundish is at least in sections open in each case, via which the molten metal filled into the tundish in casting operation flows out of the tundish into the casting mould, - the tundish is arranged on the casting mould in such a way that its pouring-out side butts against the lid of the casting mould and the bottom of the tundish is assigned to the reference side wall, wherein the pouring-in opening of the casting mould and the open section of the pouring-out side at least overlap one another, - pivoting the casting mould into a pouring-in position, in which the main plane of the reference side wall encloses an angle β1 that is less than 180° with the bath level of a molten metal portion to be filled into the tundish and the bath level of the molten metal portion to be filled into the tundish is located below the filling opening of the casting mould; - filling the tundish, which is in the pouring-in position, with the molten metal portion which is sufficient for filling the casting mould; and - pivoting the casting mould with the tundish arranged on it about the pivot axis into a pivot direction, in which as a result of the pivoting molten metal flows out of the tundish into the casting mould, wherein the pivoting is continued until an end position is reached, in which the casting mould is filled with molten metal, and wherein the angle β1 enclosed in each case between the main plane of the reference side wall and the bath level of the molten metal portion, which is contained in the tundish in each case, is at least constantly less than 180° until the melt flowing into the casting mould hits the bottom of the casting mould.