(Johnny Dangerously) - .88 Magnum
Danny Vermin's .88 Magnum
Used by the villain Danny Vermin (Joe Piscopo) in the film Johnny Dangerously, the .88 Magnum is just an long barreled Colt New Service revolver. The weapon appears purely to accommodate a verbal pun on the then famous .44 magnum revolver (made famous by Dirty Harry), since an .88 caliber would be enormous and impractical to have as a revolver round. Also 'magnum rounds' were not 'common until after years after the introduction of the .357 magnum in 1934. Until the film-viewing public becomes more gun literate, most casual movie goers would have to be told that the .88 magnum does not exist in real life.
It was made for him special. It "shoots through schools," as Vermin puts. It can shoot through armor, the victim, and a tree outside, presumably with a single shot, although it failed to penetrate Johnny's cigarette case at the end of the film.