Welcome to the forum from New York Craig. I have spent a lot of time in your wonderful city. I ran the Western Hemisphere section of a division of TNT for a lot of years and was down under at least once a month. I have friends who travel to Australia to shoot Bench Rest. Maybe we can get one of them to travel with a Spare Kreiger Barrel and leave it behind. All my Centerfire Bench Rest rifles are Kreiger Barrels. I have Bartlein's on my rimfire bench rest rifles.
A few years back when the U.S. Bench Rest Team went to Australia, the regulations precluded bringing in powder and for short range bench rest, most load on the bench. Loaded ammo was OK, so lots of 6PPC and 30BR rounds brought in as well as a bunch of 50 caliber rounds, but they were filled with Powder for the PPCs and 30 BRs. Pulled the projectiles and vola - powder for loading.