I tried raw pack once and didn’t like the results. I prefer to partially cook the meat, whatever it is, then dice it up, put it in the jar with some broth or water and can that up.
I usually just use them for soups and stews.
It’s been about 10 years since I canned chicken. I partially cooked it and cut it into cubes (chicken breast) adding a bit of broth to it. It turned out pretty good. I mostly used it for quick pots of soup or mixing in with the noodle/rice packages for dinner. I’ve been thinking of pulling my canner out and attempting the process again this year.
This year I waterbath canned for the 1st time. I had a lot of tomatoes and didn’t have any freezer space. It worked ok for pints, but I tried a couple quart jars and had to add water to keep it over the jar without overflowing the pot. I stuck to pints after that 1st batch.