The targets use a two part mixture that are easy to mix and easy to use simply mix and shoot. Targets are made with high quality non-hazardous non-toxic and stable chemicals in a highly visible blaze orange jar. To ensure safety shooters must be at least 50 yards from exploding target. To initiate explosion rifle target must be struck with a center fire rifle projectile weighting at least 40 grains and traveling at a minimum of 2200 fps pistol rounds will not initiate these targets.