Wrt to what we've figured out. It's complicated. Southern Ontario is huge really. I'm focused on South-East Ontario, near Ottawa generally. There is quite a bit of crown-land suitable for hunting slightly north west of Ottawa. Some of it even shows up on the MNR crown land atlas.
The issue is that South (and South West) of Ottawa is entirely blocked off in the MNR online atlas. Everyone keeps saying there is no crown land. This is not true. There is crown land and it is hunted regularly. The MNR won't publish details online, the Eastern Ontario Resource map isn't being republished, the Backroads Paper Maps and the Backroads GPS Map disagree or contradict each other (yes I own both.) The information is very difficult to put together. The available information is so bad that it makes me think it's being done on purpose.
I'll throw out the areas that I believe are crown land and that may be used for hunting or at least target shooting. I'm no lawyer or anything special so I might be wrong - you need to check the facts before you do something that gets you in trouble. There are no big secrets here... the big secret is the actual boundaries of the following regions.
Marlborough Forest; Larose Forest; Winchester Bog; Carp Hills Forest; Corkery Woodlands; Pinery-Long Swamp Forest.
Most of these come from the exemption list in the City of Ottawa Firearms Discharge bylaws (google it.)
Somethingspecial