Hotrack,

Suggest you contact Winchester/Olin or their distributor there for best input, but suspect that it may be the equiv. of AA452, but labeled dif for use/distribution in Oz. That was the original designation for the older ball powder for the AA Winchester 12ga. hulls here in the US.

Will be interesting to see what comes of your inquiry. Also, I'd save the container, once emptied, as there is probably some collector interest.