This is a free recipe I tried and its not bad. It is a starting point for making your own. My wife made a Lebanon Bologna that I am not allowed to share under pain of death, or so I was told. BUT this is a place for you to start.

I like mixing 5# of deer with 5# of 73% beef. That gives me about a 14% fat content and makes nice bologna. Don't get it too hot and render out the fat or it will be greasy outside and dry inside.