The Big Horn Armory Model 89 is chambered in .500 S&W Magnum. That round is a beast when it’s fired from a pistol. From a 24″ rifle barrel it hits like Thor’s Hammer, only harder. It dwarfs a .375 Holland & Holland…I’ve never shot anything more powerful . . .
Crank the YouTube resolution up to 720HD, and look for the full review in a week or two. In the meantime, here’s a low-res glimpse of what happens to a 4-pound watermelon when it tries to absorb more than 4000 lb-ft of energy.