Goose loads with a full choke probably. Slug gun, rifled barrel with a 4x scope? Buckshot in a slug gun is pretty effective too. Personally I alternate, #4 shot, buckshot, and slugs. Sometimes aiming accurately just isn’t possible, at close range stopping the charge with pain can be the priority. Once incapacitated, there is more time to choose your ammunition….or once the drone is on the ground. 😄