What is the heaviest projectile ever successfully used in battle

How powerful was the 800mm Gustav gun? - Quora

All About Schwerer Gustav & DORA Der Deutsche Stahlhelm 1939's Blog

Trivia: Gustav Max was based on Schwerer Gustav, the rail cannon made and used by the nazi germany, also considered the largest gun ever used in a war. : r/DuelLinks

Rail Cannon 80 cm (E) Schwerer Gustav (Dora), Military Wiki

Dora/Schwerer Gustav K. (E) Rail Gun, World War II Wiki

Little David - Wikiwand

Schwerer Gustav

ECS] Schwerer Gustav Railway Gun Minecraft Map

8.8 cm KwK 43 - Wikiwand

World's BIGGEST / MOST POWERFUL GUN ever built! (Heavy Gustav