The most powerful consumer fireworks re-loadable shells are 60 gram canister shells. They are quite powerful and produce huge bursts and impressive effects. Our favorite 60 gram shells are our very own Smokin’ Hot Premium Shells, which can only be found at Keystone Fireworks. Check out the video for these amazing shells by clicking here . After you’ve tried the Smokin’ Hot Shells, you’ll never want to buy another brand of artillery shell!