Tannerite brand targets employ a binary explosive used as a shot indicator for long-range firearms practice and training. Tannerite brand target detonations occur at a very high velocity, producing a large explosion and a cloud of water vapor. Small caliber rim-fire or slow moving pistol ammunition will not initiate a detonation. Tannerite is non-hazardous and can be shipped without expensive Hazmat fees. The catalyst mixes easily into each 1/2 pound target. A free instructional dvd is provided with every order which shows the legalities and requirements regarding the possession and use of this awesome product.Check with local and state laws before purchasing