Doesn't look like there's any mention of a discharge bylaw online but there has to be one about not discharging a firearm near villages, hamlets etc. etc. They usually have maps for that but I don't see anything online for North Glengarry. Best bet is to get a hold of the township, might be a PITA though with the 'rona measures in place.
No restriction on rifle caliber for coyote out here.
One of the guys that hunts in our group also goes out with a gang from the moose creek area and they all use rifles out there. Whereas our group is pretty much just scatterguns.
How close to a built up area is "close to Alexandria"?