The deposits resulting from the discharge of 0.22 calibre ammunition have been studied by neutron activation analysis and autoradiography. Material ejected forward with the bullet, and material ejected between a revolver cylinder and barrel, have been collected, both on filter paper an on a variety of clothing fabrics. The extent of the deposits has been studied visually, by soft X-ray radiography, and by autoradiography following neutron activation; the latter revealed features not visible by other techniques. The elemental composition of a number of discreet features of the deposit pattern was then determined by neutron activation analysis and compared with the composition of deposits obtained by primer firings alone, from the burning of propellant, and from the analysis of bullet lead. The preliminary identification of the various deposit components is discussed, together with the forensic implications.