Sorry to hear. Get a plate next time and report to RAPP.
wildlife act states:
Obstructing licensed persons
80 A person commits an offence if the person interferes with or obstructs a person licensed or permitted to capture wildlife or to hunt, fish, guide or trap while that person is lawfully so engaged.

He could offer up the defense of target practice, but the rate of discharge and nature would be suspect as would the defense itself as he specifically asked if you were hinting the area in advance of the barrage.

Long shot,but at least it would be on record...