Ball Style Artillery Shells are round shells with a base. Ball shells can be single, double, triple or even quadruple break shells. A “break” is simply an explosion. So, a single break shell produces one explosion, a double break shell (which is two ball shells on top of one another) produces two separate explosions, and so on. Ball shells generally contain up to 40 grams of pyrotechnic compound. Shop for ball style artillery shells at Got Fireworks. Choose from single, double, triple break shells for your celebration. Buy now and light up the sky!