Here we go again...
I'm using 110gr V-max in mine...And I'm in Ontario...
For factory ammo, I'd use the cheapest load that shot well...
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.