chamber disclosed and claimed herein this particular preferred formulation contains in weight percent about 50 to about 55 preferably about 53 5 strontium nitrate oxidizer about 35 to about 45 preferably about 40 aluminum powder metallic fuel about 3 to about 6 preferably about 5 sulfur non metallic fuel and about 0 5 to about 1 5 preferably about 1 boric acid ph stabilizer and finally about 0 5 of a free flow anti caking agent such as m5 cab o sil free flow anti caking agent available from cabot corporation u2014 becca golden alpharetta ga about 8 to about 10 grams preferably about 9 grams of this strontium nitrate containing formulation are required to provide the desired sound and light properties considering the density of this formulation to accommodate the 8 to 10 gram quantity required the cylindrical chamber formed by the inner sleeve 80 would be about u215d inches in diameter by about 1 u215e inches long a series of repetitive performance tests were conducted with the subject invention the results of which are detailed in table i immediately below the preferred embodiment of the present invention used in the series of tests included a charge of 9 grams of a pyrotechnic mix of about 53 7 wt strontium nitrate oxidizer about 40 wt aluminum powder metallic fuel about 5 wt sulfur non metallic fuel about 1 wt boric acid ph stabilizer and finally about 0 3 wt m5 cab o sil free flow anti caking agent and a reaction chamber of the subject design the particular preferred reaction chamber used in the tests had a 0 005 inch aluminum inner sleeve 80 an aluminum charge holder 30 with 6 sets of equally spaced about the.