It would be very differcult to tell as the replica actions are almost a 100% duplicate . There are some differences besides the different propritary steels use for different parts. The tolerances have been tightened up considerably, there is a mann-Neidner bushed firing pin and all parts have been sent to a "Specialty " heat treat shop. Loading port has been opened to handle a larger cart. such as the 50-90 & etc. The action still has the one degree draft to the tangs and the three gree angled cut at rear of action for stock ears to be inletted into. FWIW, Ken
