For a Bit of Chronology, after the Aussie Team saw the Russian Running Deer Rifles (Converted M1910 Ross Rifles, ex-Estonia 1940 Ex-Britain 1919) at the Melbourne Olympics, the Aussie team got a Garand converted to Straight Pull, rimmed (.303) case firing using a Light Bullet ( 100 grains, If I remember.). The Cases (several types, rear Primer ignition, forward (tube) primer Ignition, etc) made up by the Tool room of MF Footscray, for Possible use at the Moscow World Cup ( 1958). None were successful, and at the 1960 Olympics, the team reverted to classic Bolt rifles.
I had the chance to speak with a Retired Melbourne Engineer from the 1950s, whose company did the Garand Conversion (they were precision Machinists of Ordnance sights etc for the D^D) back in the early 1990s. He said that only one Garand was converted, and it had issues with feed of the rimmed .303 cases, etc.
That Garand is who knows where?? also, one of the Russian Ross rifles was “Liberated” back in 1956 ( along with the entire Hungarian Olympic Team) and is still somewhere in Australia (cal 6,35?/6,5?x54R RD).