What is the deal with a metal cannonball exploding? Is it just movie BS effects or was there really powder inside and some sort of fuse or something? If it's real how
Round shot - Wikipedia
Do cannonballs explode in flaming fashion as depicted in “Pirates of the Caribbean?” - The Straight Dope
Civil War Cannonball Exploded & Killed 140 Years After it Was Fired | War History Online
Man buys 160-year-old Civil War-era live explosive for $3, thinking it was cannonball | WLOS
Cannonballs Unearthed at the Allegheny Arsenal - Heinz History Center
Do Cannon Balls Explode? - Parade
Civil War cannonball discovered in Maryland disposed by bomb squad - ABC News