I don't have any tips because I don't can meat, and I've had some trouble with chili. Someone told me not to fill the jars all the way if I'm canning chili--leaving like 1/4 of the jar unfilled... which just seems weird, but I had a lot of leakage and they told me that's how they always did it.
Otherwise, I know that I've had wicked problems because I was cooking my soups before canning them; and then the heat of pressure canning them made them taste horrible (overcooked). I would check out a good canning book for meat on this point. I like "Stocking Up" and "Putting Food By". Your library should have one of them.
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