Reloading the .357 SIG is no "harder" than reloading any rifle round. The difference between reloading the .357 and a straight-walled case is the SIG requires lubing, which is an annoyance to me when doing any large quantity of reloading. It's actually easier as it only requires two dies, not the typical 3 or 4 that straight-walled cases do.

As for the short neck, the only problem inherrent with it is it can be more prone to "setback" if one decides to rechamber repeatedly.