Yes, bolt head faces are the same from the model 1900 to the latest postwar “Magnum” models. Just the ejectors and extractors differ slightly to accommodate the different case rim sizes. Even the Mannlicher M92 – 95 boltheads differ just in not having the two – stepped ejector groove, as the rimmed cases did not need it. Only the M93 Romanian and M96 Portuguese boltheads are entirely different as their ejectors are entirely different.