Lucky revolver.
Seriously, he's just scared of the revolver, it's another action type he never was and never will be good with, and he's afraid of it, so he has to run it down.
As an aside, those old battlecruiser stationwagons (like the Roadmaster, Parisienne, etc.) have one hell of a lot more capability than his much vaunted minivan (the one his wife drives him to the playground with).
Seriously, he's just scared of the revolver, it's another action type he never was and never will be good with, and he's afraid of it, so he has to run it down.
As an aside, those old battlecruiser stationwagons (like the Roadmaster, Parisienne, etc.) have one hell of a lot more capability than his much vaunted minivan (the one his wife drives him to the playground with).