It keeps just fine, just like canned venison.
How are you canning it? Make the stock and then pressure cook it or do you just pour the boiling stock into sterile jars and slap the lids on?
Stock, or canned venison. 45 minutes at 15lbs of pressure, or an hour at 10lbs. I add a half tsp of salt per pint of canned venison, and pack it raw. Stock is already cooked , but mine would have some venison in it, say if I was cleaning up neck bones or other vertabra . It all cans.