Modelling SAG milling power and specific energy distribution affects the SAG mill load and the load affects directly the mill power and the efﬁciency of the mill operation Van Nierop and Moys 2001 If a SAG mill has been designed with a conventional power or speciﬁc energy model which do not con sider the projected feed size distribution it is likely that this mill will reach the expected power consumption but will not satisfy the