Seems like the best way is to add no fat and to trim the fat off the meat then grind for burger ...I.ve had excellent burger before but I think its how much game fat they leave in...This last fall I was convinced to add beef fat to my burger and it seems to have proven the wrong choice..Maybe the beef wasn't grained so it was free range ...They can be very beefy....gamey...Think I'll just go with extra lean and have my rib meat set aside for sausage or pepperoni..The last elk was a cow and shouldn't of been gamey ..but the bulls I've killed were less gamey...Thanks for the input !...Dennis