Feedstock of 97 weight% tungsten heavy alloy with different particle characteristics was injection molded as tensile bars and investigated for green d., solvent debinding kinetics, sintered d., and the tensile properties. Feedstock with higher agglomerate content resulted in injection molded bars with lower green d. Contrary to the expectations, the debinding kinetics, sintered d., and sintered properties of the heavy alloys were not influenced by the agglomerate content. Microstructural and fractog. anal. of the sintered samples supported the above observations, with similarities in microstructural parameters such as contiguity, porosity, grain size, and fracture morphol. of the sintered alloys. It is concluded that favorable wetting, spreading and solubility characteristics of tungsten and the liquid phase consisting of W-Fe-Ni eliminate the inhomogeneities in the microstructure resulting in densification and uniform sintered properties.