Originally posted by Adrian.
I think that when you say Aussie like Ossie it doesn't right it just sounds wrong. People in Australia say it with a z sound witch is Ozzie hence the fact that people say "you come from Oz" or "you come from Aus" with if you say that with a s sound it just sounds weird witch is why people say it with a z sound.
Haha its pronounced with the z like you said , ossie sounds stupid hahaha.