It's reformed military 7.62x51mm brass. IVI is the monogram for the Industries Valcartier Inc now owned by GDOTS, the double digit number is the year the brass cartridge case was manufactured and the circle with a cross is the NATO interchangeability symbol.
Can't be anything but a NATO calibre (ie: 5.56mm, 7.62mm or 9mm Luger) because it has the NATO interchangeability symbol, meaning Linked 7.62mm manufactured in Canada for Canadian Army specs can be used in a German MG3 for example, without damaging the weapon system.