I'm not sure why they changed the model names/numbers. Going with bigger screws was a good thing. Changing model names can make it more confusing. It use to be you had I think Model 10, 11,12 and 16s which was a short action and 110, 111,112 and 116s which was long action. Now they are all 110. Didn't they also change barrel shanks at one point also?