Until recently we had a company making shotgun powder (AS30 and AS50 - double based powders which were replaced by a single based powder APS350 and there was supposed to be a slower APS 450 which never showed up). The company has decided to cease production of shotgun powders.
I understand AS30 and AS50 were sold in the US as Red Dot and Green Dot but I could be wrong there.
Apparently it is very difficult to ship powders around the world and as far as I know there are no alternatives available.
Winchester used to make shotgun shells here, but gave up production a while ago and now sells imported 'Winchester' shells - so no chance of sourcing powder there. There are no other large scale shotgun cartridge makers currently operating in Australia.
So Australian shotgun reloaders will be in trouble when their stocks of powder run out (shops have long been out of shotgun powders).
I also understand this will impact pistol reloaders.
I hope that somebody will import some powder, but reloading isn't big here (you don't really save much at all by reloading), so the economics are against us.
I enjoy reloading and making shells which perform how I like - sadly, it looks like reloading may be dying here...