Under magazine capacity maximal physical number of the cartridges in the magazine of firearm is understood.
Canadian Government, as any other one as well, will apply federal magazine capacity limits to some certain firearms, meant for civil market use to be all the time stronger in any possible situations of confrontation, than their residents (as possible criminals).
For example, any non-semi-automatic shotguns will be completely unlimited, although any semi-automatic and center-fire firearm will be a subject to only maximum 5 cartridges physically in its magazine.
Any handgun meant for civil use (such as target practicing) will be a subject to 10 rounds in its magazine.