One or more hours prior to grinding place venison and fat in the freezer to firm up. The amount of time will be dependent on how much meat you are grinding.
You can also put the metal meat grinder attachments (grinding plate, blade, auger, etc...) in the freezer to help keep meat cold as it grinds.
When the meat and fat are firm, but not frozen solid, remove from the freezer and assemble the meat grinder, using the coarse grinding plate (10mm) for the first run and the medium grinding plate (7mm or 3/16") for the second run.
Alternating in equal intervals between meat and fat, grind everything through the meat grinder into a large bowl. Mix to evenly disperse the fat if needed, then switch to the medium grinding plate and run everything through again a second time. (you can use the medium grinding plate for both runs if desired)
Portion 1-2 pounds of ground venison into storage bags and freeze.