The 6.5x55 and the 257 Roberts would be pretty danged slick in that action and since you have a smith it makes it even better. Which barrel were you planning on using? Are there Australian made barrels or do you order them from the US?
Sounds like a great build. The 257 Ackley is a pretty neat cartridge as is the 6.5x55 or the Improved version and they both fit the 98 well. Good luck.
