However, according to hunting ethics, shooting at a walking deer may not be considered ethical as the animal may not be presenting a clear, clean shot. The appropriate time to take a shot is when the animal is still and broadside. Regarding the amount of lead needed, it depends on the caliber of the rifle and the distance of the shot. It is important to use a caliber that is appropriate for the size of the animal to ensure a clean kill. As for the Leupold duplex reticle, the transition from thin to heavy should be enough at 100 yards, but it is always recommended to practice and familiarize yourself with your equipment before going on a hunt.