A mixture of AISI M2 + 10%vol. NbC was processed in an Atrittor high energy mill to obtain a composite powder. The milling time was varied during the process. The equation <(ln(1/1-D) =A root P + B)under bar> was used to fit the compacting experimental data from the composite milled powders. The linear correlation coefficients were better than 0.985 for all the composite powders. The parameters A and B from this equation were used to show how the composite powder characteristic changed after attritional milling.