The buck I shot this year, I had no choice but to stop him, I was already at about 3/4 draw when I grunted at him to stop, finished the draw and let it go. Worked perfectly. I've shot them walking as well but as others have said I have a much much harder time picking a hair on a walking deer. I also get like tunnel vision and have clipped branches i didn't see while shooting at walking deer, this never ends well.