Mark
Well your recipe looks fine as far as the spices go, lots of good flavors there.
You may want to use pork butt instead of the shoulder, the butt will have
more fat on it resulting in a juicer sausage. Basically you are looking for a ratio
of 75% lean meat and 25% fat, achieving that with just the fat from the pork
may not be possible with the added venison, so more fat will be needed. You could ask your butcher for some or better yet try to source some pork back fat, that is the best. This is just a general suggestion, the amount of fat on a pork butt can vary wildly, these days some butchers are cutting off the fat cap of the butt for a “healthier” cut of meat I guess, leaving the sausage maker with less than ideal amount of fat. The fat ratio is just something you need to get a feel for. Other options would be to add some binders and other additives to your sausage, non fat dry milk can help, I also use corn syrup solids and soy protein concentrate. All three can help retain the moisture in the meat during the cooking process. Take a look at Len Poli’s site (google “Len poli” and it will come right up) he has lots of information on this subject.
Cal