I would guess the higher grade Stevens made with the heavy schuetzen 44 action could be ordered in rimfire cartridges. Yes,the 417 Stevens had a beefier frame then an earlier model 44. The model 44's were discontinued when Stevens introduced the 417 and 417 1/2's. Also, Stevens model 414's top octagon flat of the frame were milled down for the receiver sight that was specially made for the 414's. By the way Stevens model 404's are quite scarce.