The OP has done an excellent job of providing advice. One small area for correction is the statement: "A note for new Southern Ontario hunters. Keep in mind that the gun seasons for deer in much of Southern Ontario are shotgun/muzzleloader only (if you have not done your hunter ed course yet, you'll find out all about this soon). Also, shooting any small game and predators in many municipalities is limited to rifles nominally of .275 or less. There is some confusion about whether or not the .270 is allowed or not. The letter of the law is 'nominally', and it is indeed smaller than .275 in name, and so is allowed. For the metric calibers, 6.5mm is OK, 7mm is not."
The statement is incorrect. The Ontario Hunting Regulations make NO mention of the word 'nominally' and the use of the phrase 'letter of the law' is incorrect IMO. The Ontario Hunting Regulations Summary 2016 state: "A person hunting small game may not carry or use a rifle of greater calibre than a .275-calibre rifle, except a muzzle-loading gun, in the geographic areas of Brant,....." etc etc.
The reason that a rifle, marked as being of .270W calibre, is acceptable in the identified areas is because the term 'calibre' may correctly refer to EITHER one of the two following measurements - in a rifled barrel the distance measured between opposing lands (aka bore diameter) or grooves; groove measurements are common in cartridge designations originating in the United States, while land measurements are more common elsewhere. A rifle chambered for the 'calibre' known as .270W has a groove diameter of .277 BUT the bore diameter is .270 and thus it is legitimately a rifle of calibre .270 AND not "of greater calibre than a .275-calibre rifle".