Sonic Boom's Exploding Rifle Targets provide a unique shooting experience by creating an impressively large explosion and loud ?boom? upon bullet impact. Sonic Boom produces targets with high quality non-hazardous, non-toxic, stable chemicals. The targets use a two part mixture that are easy to mix and easy to use?simply mix and shoot. To ensure safety, shooters must be at least 100 yards from exploding target. To initiate explosion, rifle target must be struck with a center fire rifle projectile, weighing at least 40 grains and traveling at a minimum of 2200 fps (pistol rounds will not initiate these targets). Enhance shooting experience Non-hazardous and non-toxic Easy to mix and use