MI.264 is right. Search on Youtube for Randy Newberg and listen to his advise on rifle choice. Very spot on from a very fine rifleman. I use 7mm RM across the board with a Muzzlebreaksandmore.com brake and it is a joy to shoot and very comfortable at 900 yards with it.
Do you have a 4 wheeler? They make some pretty good attachments for them when you can't reach areas with equipment or don't have any? You can rent rubber track equipment fairly cheap and can move it with a pickup truck and trailer or get them to drop off and pickup. Just a thought if not...
www.Greentophuntfish.com has a few, mostly 30cal/7.62 and .22 caliber. Sierra seems to be producing more handgun ammo and reloading supply than rifle now.
Austrailia is the perfect testing ground for a communist/socialist/Marxist take over due to being an island and easily controlling who can and can come and go. Their leaders were paid by big Pharma to mandate vaccines and fear monger their people. I feel for them but on the other hand they...