Re: 22 rimfire smooth bore
Sad thing is, it was totally un-neccesary to make them smoothbore...
rifling has little-to-no-effect on ratshot at close ranges.
The difference between a Marlin 25MG Garden Gun and any other 25-series was the smooth bore.
The downside is that's ALL the MG is good for, snake/rat/close range pest control...
whereas you could use the ratshot ammo in any of the .22lr/.22WMR 25-series Marlins and still use them for other things.
A gun should be a tool in the hands of a deadly weapon, not a deadly weapon in the hands of a tool.