No offence but if this is true...Well it just depends on what part of Ontario your in.
from the regs:
The holder of a small game licence may not use a rifle of
greater calibre than .275, except a flintlock or percussion
cap muzzle-loading gun, for hunting small game in the
counties of Brant, Elgin, Essex, Huron, Lambton, Middlesex,
Northumberland, Oxford, Perth and Wellington and the
regional municipalities of Chatham/Kent, Durham, the
former regional municipalities of Haldimand-Norfolk and
Hamilton-Wentworth, Halton, Niagara, Peel, Waterloo and
York and the City of Toronto.
The people in Ontario that make these reg's are f'd up!
So you are supposed to go squirrel or grouse hunting with a 30 cal! What the hell would be left? Honestly common sense isn't that common any more.