I remember an Uncle who used to get the 'Outdoors' magazine, I'll have to look in the old bureau here & see what I come up with!

I'm sure it had rifles in it that were 303/243 & 7.7x54R which the last was a 'up yours' to the NSW Government at the time.
In the end common sense ruled & the military rifle calibre debacle faded into history!
Also heard of the 303/35 as well!