Best time of day to take one is early in the morning and towards the end of the day......this is when they bunch up and are more approachable without being spooked.
Mid day hunting is OK, but the bucks are busy keeping their harem together. This means they are constantly running and stressed, (meat not as tasty as when they are calm and relaxed).
Never try to outrun or drive antelope like deer....you'll only come away exhausted and empty handed.
They have the eyesight equivalent of 8X binocs.
Beware of the cactus and rattle snakes.....