Let me present the world's larget handgun, a revolver firing the H&H .600 Nitro Express (a round developed in 1899 for shooting elephants). You kind of have to see this to believe it, and even then you may think, "That's not for real."
(HT Stephen Bodio, another Patrick Leigh Fermor fan)
Through Darkest Zymurgia!
43 minutes ago