Due to the armed forces´ excess of ammunition today, large amounts of ammunition are sent to disposal. Valuable components, e.g. metals and explosives, are recycled for civil applications. The recycle processes are not closed processes; however, and generates industrial waste just like any conventional industrial process. The difference is that this waste often is contaminated with explosives. Therefore it cannot be sent to a conventional waste incineration plant, but has to be disposed off on site. Today, this is achieved by open burning, hence resulting in uncontrolled emissions of air pollutants. The goal is to develop a process for closed burning to enable cleaning of the exhaust gases. In order to achieve this the size of the explosive contaminated waste have to be reduced. In this report grinding tests with several different equipments are presented, along with their pros and cons. The results show that most materials can be size reduced if the right equipment is used. In the tests where explosive materials were size reduced, no sign of explosion was detected. Before the method is put in operation the risks have to be assessed. All size reduction should be carried out in a remotely controlled space to avoid any injuries in case of an accidental explosion.