Bob.
I use Muzzy 3 blade 100 grain over here.
But you can get some good Aussie made heads like the Black Stumps, Ribtek and Tusker are some to look at.

here is the url for the Ribtek heads www.ribtek.com
The Tusker heads can be found here www.bowhuntingaustralia.com


Aussie by birth Texan by choice