I have a couple Stevens .22lr shot & .32 rf shot , the smooth bore
makes quite the difference in patterning .
A .22 shot shell out of a rifled 22'' barrel would be ineffective
on any thing @ 15' except a butterfly whereas shot from a smooth
bore will pattern 60% tighter.
The beauty of these was the minimal damage when used indoors, removing
birds was the primary use .
Henry does a Lever action , Anschutz had a single shot & Remington made
a model 61 or 63 .22 rf shot , I'm certain there were others.
... skwerl
Taken from the 1899 Stevens catalog