What is the length of your case in mm? The correct length should be around 610mm.
This case was made for a variation of the British designed 105mm L7 Tank gun, which was used and manufactured by a number of other countries.
As far as I can tell from the markings, the case was made in Canada by IVI in 1979. The primer was made by DAG in Germany, and the case was loaded by EMZ in the Netherlands. I may be wrong about some of the markings, so would appreciate correction if needed.
The large SH/T PRAC marking indicates that the case was loaded with a Squash head tracer practise projectile. This was a projectile fired during training exercises which would be designed to match the weight and dimensions of a live projectile to provide similar ballistic performance. The tracer is a component mounted to the base of the projectile which burns with a bright light. This shows the path of the shell in flight.
A live squash head projectile is a type of shell designed to flatten against the armour of a tank before exploding. This is designed to blow fragments of the armour off inside the tank.