perchlorate ap 5 wt of 100 u03bcm rdx and 30 75 wt of 2 u03bcm rdx additional ingredients can also be introduced into the melt cast composition of this invention for example a particularly desirable additional ingredient comprises reactive metals such as aluminum magnesium boron titanium zirconium silicon and mixtures thereof reactive metals are particularly useful in applications in which the melt cast explosive is submerged or otherwise exposed to large amounts of water preferably the melt cast composition of this invention is substantially free of polymeric binders conventionally found in pressable and extrudable energetic materials since an undue amount of these polymeric binders can lower the energy especially for non energetic polymer binders and reduce the melt pourability by increasing the viscosity of the melt cast explosive the following examples illustrate embodiments which have been made in accordance with the present invention also set forth are comparative examples prepared for comparison purposes the inventive embodiments are not exhaustive or exclusive but merely representative of the invention examples 1 and 2 were prepared as follows the dinitroanisole dnan was introduced into a melt kettle and heated to melt the dnan into a liquid state the processing aid n methyl p nitroaniline mna was also added at this time while stirring the fine rdx was added at a sufficiently slow rate to facilitate thorough wetting of the rdx fine powder the coarse rdx was then added by stirring followed by the ammonium perchlorate inorganic oxidizer which was also added while stirring once homogeneous stirring was.