I've had several drop right where I hit them. The only thing with horns that dropped where I hit him was a six point. He didn't drop right away. He kind of shook his head and then went back to eating. Then he just dropped.

This guy dropped instantly and his brother wouldn't leave him trying to get him to get up. I would have shot him and his mother but I was hunting a golf course and had to be descrete for the members concern.