definition of 'Unload' from the Firearms Act:
http://laws-lois.justice.gc.ca/eng/r...age-1.html#h-1
“unloaded”
“unloaded”, in respect of a firearm, means that any propellant, projectile or cartridge that can be discharged from the firearm is not contained in the breech or firing chamber of the firearm nor in the cartridge magazine attached to or inserted into the firearm. (non chargée)
MNR page 23
A muzzle-loading gun is a gun that is loaded through the
muzzle. A percussion muzzle-loading gun is considered to
be loaded if there is a charge of powder and a projectile in
the barrel and a percussion cap on the nipple. A flint-lock
muzzle-loading gun is considered to be loaded if there is a
charge of powder and a projectile in the barrel and the vent is
unplugged. An electronic muzzle-loading gun is considered to
be loaded if there is a projectile in the barrel.