A 50 Cal Revolver - RSh-12 (2000) ( lemmy.world )
...the most powerful production revolver in the world anyway, and that’s just according to the manufacturer. For whatever reason, Russian designers took to creating a revolver to fire their 12.7x55mm cartridge (speculated to be a cut-down .338 Lapua case...), it has been suggested for the purpose of destroying locks and other objects.
https://lemmy.world/pictrs/image/b63a6b70-006d-4c0c-904c-5aafceb271c0.jpeg
https://www.thefirearmblog.com/blog/2014/09/17/meet-rsh-12-powerful-revolver-world-russian/