What purpose did the slots in action serve?
I don't really know. The same type of slots are typically seen on Alexander Henry rifles of the same period. I would assume the purpose is to lighten the rifle somewhat. This rifle weighs exactly 11 pounds.
Of course, the Jones action has no cuts for A&D cocking levers, so there is plenty of meat to play with in the bars.
You said it was a gun you used to own, must have been a serious moment of madness to let such a beautiful thing go.
Yeah, a moment of weakness just a year ago!
Curl