The majority are, but ones made really small (think sterotypical tv/movie detective with ankle holster or shoulder holster) typically hold 5 to minimize overall size.
Even larger guns can either have 7, 8, or 10 shot if they’re made for really small cartridges for relaxed target shooting, or 5 if they are one of the modern uber magnum bear defense types.
The majority are, but ones made really small (think sterotypical tv/movie detective with ankle holster or shoulder holster) typically hold 5 to minimize overall size.
Even larger guns can either have 7, 8, or 10 shot if they’re made for really small cartridges for relaxed target shooting, or 5 if they are one of the modern uber magnum bear defense types.