A test series with five detonations of high explosives and 155 mm artillery shells inside small reinforced buildings has been performed. Loading densities varied between 0.9 and 13.8 kg/m3. Debris throw was recorded with high speed digital video cameras during the tests and post test pick up was made to determine debris mass size distribution and location. The blast pressure around the test objects was also recorded. The objective of the test series was to get experimental data related to the hazards to surroundings after an accidental explosion in an above ground ammunition magazine.