If you google " Canning Meat ", you can find a number of sites that give you specific information.
Here is one I found that seems to be very thorough, and easy to follow:[url]
http://muextension.missouri.edu/xplor/hesguide/foodnut/gh1490.htm[/url]
The purpose of canning is to store the meat at room temperatures without fearing that bacteria will spoil the meat, creating lethal botulism. You sterilize the jars and lids to kill off any airborne bacteria. You either pack fresh meat chilled, or boil the meat for certain time length, depending on what elevation you live at. That kills any bacteria present in the meat. When you heat the " cans"( Really mason jars, today, for the most of us) in boiling water, and put the lids on. you are creating a partial vacuum, which keeps any new bacteria from entering the jar during storage. Since Bacteria are responsible for all spoilage, their absense allows the product to be stored for months, and sometimes years. Note, however, that the quality of the meat may degrade over time, because of the presense of Enzymes, in the meat, and fat, and connective tissue, and those enzymes will continue to work on the meat chemically. It would behoove you to remove the fat, and connective tissue from the meat, before storage, as these are the source of most of the enzymes.