Combine ground moose, ground pork, chopped onions, cubed potatoes, allspice, savory, dry mustard, salt, and pepper in a bowl.

Refrigerate the meat mixture overnight to allow flavors to meld.

Transfer the meat mixture to a large pot or Dutch oven.

Add beef stock to the pot.

Simmer the meat mixture over medium-low heat, stirring occasionally, until all liquid has boiled away. This will take approximately 3 to 4 hours.

Allow the meat mixture to cool slightly.

Preheat oven to 375°F (190°C).

Line pie dishes with pie crust.

Fill the pie crusts with the cooled meat mixture.

Cover pies with the remaining pie crust.

Cut slits in the top crust to allow steam to escape.

Bake in the preheated oven for 30-40 minutes, or until the crust is golden brown and the filling is heated through.

Let cool slightly before serving.