"...so the prohibited ammunition is not..." Nope. It's prohibited to sell or possess. Too evil. Incendiaries, for example. NRCan thinks tracers and AP are prohibited too, but they're wrong. They won't allow it to be imported though. This is civil servants making law by regulation.
If you don't report your property as being stolen, should you become the victim of a crime, you will never get it back. Police departments typically destroy both firearms and ammo they recover anyway. Mind you, you wouldn't be able to identify recovered stolen ammo as your property anyway.