I haven't had time to search through this yet, but it looks potentially interesting; it's the only comprehensive database I've found, so far, with regard to Stand Your Ground cases.
On surface skimming of it, I noted that of the 133 cases for which the paper had charge and trial data, there were 39 convictions.
I'll need to verify, but it seems to me that would suggest that when Stand Your Ground has been improperly claimed, the Justice system has worked properly. In other words, Stand Your Ground isn't a Get out of Jail Free card, if the case is not a good one.
This makes me wonder, yet again, why SYG has so many strident opponents.