... Tamper mass 40' is monolithic; however, a plurality of monolithic masses can be used to contain an explosive. Thus, as shown in FIG. 4, a plurality of tamper masses 140 can be used ... States Patent 4,628,819 Backofen, Jr. , et al. December 16, 1986 Disintegrating tamper mass Abstract A tamper mass including particulate material held together by a binder in a elf-contained ... invention in which the tamper mass is used as a pellet or a shot; and FIG. 7 is still another alternate embodiment of the present invention in which the tamper mass is also used as a projectile....