Ben,
I have no idea what is available to you guys in Australia, but here there are some CZ 550's available in 7x57. I had wanted one for a number of years, & was about to settle for a well used Ruger, when a friend put me onto the CZ availability. I have now seen 5 of them, & all have upgraded wood with no upgrade in price.

Mine is a handsome piece, with a factory 50 meter target group measuring .216 inches. I'm just now beginning the load development process, & obviously have high expectations in that regard.
Jim