I've played around with the 43 Mauser for the last 6 or so years in both a 71 and 71/84 Mauser. I like to refer to it as the German version of the 45-70 or the 45-70 as the American version of the 43. In fact, any load data for the 45-70 1873 Trapdoors can be used in the 43, just pay attention to bullet weight. Have fun!