223, 22/250, 243, 270, 308
The 308 is far more popular i Australia than the 30/06 and I suppose being the military cartridge being the reason. Of the five I listed I would think the 22/250 would be last and by a fair way.
While very common I left out the rimfires and 12 gauge but they are very common.
I figured the 222 and not the 30/06 OR the 308 OR the 223, due to them being military cartridges, the larger two replaced by the 243, 270 and the like.
