A turbine bucket comprising: a base; a blade coupled to the base and extending radially outward from the base, the blade including: a body having: a pressure side; a suction side opposing the pressure side; a leading edge between the pressure side and the suction side; and a trailing edge between the pressure side and the suction side on a side opposing the leading edge; and a plurality of radially extending cooling passageways within the body, the plurality of radially extending cooling passageways comprising a first set of radially extending cooling passageways and a second, distinct set of radially extending cooling passageways; and a shroud coupled to the blade radially outboard of the blade, the shroud including: an outlet path extending at least partially circumferentially through the shroud and fluidly connected with all of the second, distinct set of radially extending cooling passageways; and a rail delineating an approximate mid-point between a leading half of the shroud and a trailing half of the shroud, wherein the outlet path extends within the shroud through the leading half and the rail, characterised in that the turbine bucket further comprises at least one bleed aperture fluidly coupled with the first set of radially extending cooling passageways, the at least one bleed aperture extending through the body at the trailing edge and a plenum within the body, the plenum fluidly connected with the first set of radially extending cooling passageways and the at least one bleed aperture which forms an outlet of the plenum. a base; a blade coupled to the base and extending radially outward from the base, the blade including: a body having: a pressure side; a suction side opposing the pressure side; a leading edge between the pressure side and the suction side; and a trailing edge between the pressure side and the suction side on a side opposing the leading edge; and a plurality of radially extending cooling passageways within the body, the plurality of radially extending cooling passageways comprising a first set of radially extending cooling passageways and a second, distinct set of radially extending cooling passageways; and a pressure side; a suction side opposing the pressure side; a leading edge between the pressure side and the suction side; and a trailing edge between the pressure side and the suction side on a side opposing the leading edge; and a plurality of radially extending cooling passageways within the body, the plurality of radially extending cooling passageways comprising a first set of radially extending cooling passageways and a second, distinct set of radially extending cooling passageways; and a shroud coupled to the blade radially outboard of the blade, the shroud including: an outlet path extending at least partially circumferentially through the shroud and fluidly connected with all of the second, distinct set of radially extending cooling passageways; and a rail delineating an approximate mid-point between a leading half of the shroud and a trailing half of the shroud, wherein the outlet path extends within the shroud through the leading half and the rail, characterised in that the turbine bucket further comprises at least one bleed aperture fluidly coupled with the first set of radially extending cooling passageways, the at least one bleed aperture extending through the body at the trailing edge and a plenum within the body, the plenum fluidly connected with the first set of radially extending cooling passageways and the at least one bleed aperture which forms an outlet of the plenum. an outlet path extending at least partially circumferentially through the shroud and fluidly connected with all of the second, distinct set of radially extending cooling passageways; and a rail delineating an approximate mid-point between a leading half of the shroud and a trailing half of the shroud, wherein the outlet path extends within the shroud through the leading half and the rail, characterised in that the turbine bucket further comprises at least one bleed aperture fluidly coupled with the first set of radially extending cooling passageways, the at least one bleed aperture extending through the body at the trailing edge and a plenum within the body, the plenum fluidly connected with the first set of radially extending cooling passageways and the at least one bleed aperture which forms an outlet of the plenum.