Daryl, when the Swiss introduced the 9.3x53R in the 1920s they had no domestic "big game" exxcept roe deer and a few chamois. As the use of scopes or peep sights for hunting was deemed unsporting and prohibited in most counties, the ballistics of the "Swiss load" of the 9.3x72R were entirely satisfactory. As a result of WW1 the supply of German and Austrian made break-open guns was uncertain at best. The Swiss-made Martini actions could not handle the long, straight 9.3x72R, so they packed the same ballistics in a shorter, bottlenecked case, the same thing the British did some decades earlier when they designed the .577-450 MH to take Alexander Henry's .450 3 1/4" load.