I have shot mine but not a lot. When I do it's usually with these reloads.
https://www.milsurps.com/images/impo...vyReload-1.jpg
Mine is Navy marked with the arrow on top strap and also has Australian markings. For now it has a 22 single shot adapter inserted and I plink beer cans in the back yard with it. Fun guns. Shame you can't shoot yours.