Remington, Winchester, Sako to name a few
You probably have to contact someone in Australia although they recently lost most of their guns to the government and you may be out of luck.
22 is a rimfire, 222 is a centerfire.
A .222 is a .22 cal center fire weapon at fires a .222 round
Savage made it for Montgomery Ward. It's the same as the Savage 840.
The value of a Remington model 600 .222 caliber depends on the condition of the gun. One in excellent condition is worth approximately $500, as of 2014.
$500-$600
probably between 1950 and 1965 but you can look up blue book of firearms and learn more
Well, it depends on what you mean. The caliber is "determined" at time of production based on whatever caliber the manufacturer wants it to be. The caliber can be determined later by looking on the barrel. The caliber will almost always be stamped somewhere on the barrel.
Range between 35-60 grains.
50-1000 USD or more depending on condition, finish, wood, box, papers, accessories, date made, etc..
Looks like it's 1-14.
Usually, no. the .220 Swift cartridge is quite a bit longer, and has a larger cartridge head.