Please read the section below for the by-law. I believe it prohibits discharging a firearm in the marlborough forest. I'd hate for you to run into any issues.
4. (1) In the areas that are not shaded on any of the maps attached as Schedules "A" to "P" inclusive or that are not navigable water as described in subsection 3(1), no person shall discharge a firearm,
on, over or across any highway or portion thereof;
on, over or across any public land within the City of Ottawa including parks, conservation areas, forestry lands formerly managed by the Ontario Ministry of Natural Resources and described in By-law No. 2001-439 of the City of Ottawa, school property, recreational areas, but not including,
an unopened road allowance, and
the forestry lands formerly managed by the Ministry of Natural Resources described in By-law No. 2001-439 and known as:
Carp Hills Forest;
Corkery Woodlands;
Marlborough Forest; and
Pinery-Long Swamp Forest;