Deer processing question

I do one 10-13 lbs brisket per deboned deer. An average deer is about 20-25 lbs of meat when deboned

Where can you buy beef fat? What kind of place? Grocery store meat dept?

I tried 30% beef fat with deer this year for hamburgers. It seems to be great. Might could get by with less though. The beef fat is easily obtained at local grocery stores. Hog fat is a little harder to get since deer processing usually keeps it bought up.

Got it done today. I had 40 pounds of deer meat and used 5 pounds of beef fat. I fried some burgers on the black stone and they had a good taste. The only thing is they wanted to fall apart. Do I need more fat or was it too much? Thats

Yes unless you just want to deal with the burgers falling apart. Mixing bread crumbs, eggs, dry Italian seasoning, etc helps it all stick together but nothing beats fat