How new are you to hunting? how well can you shoot, how well can you hold your nerves when faced with a deer or big buck? If you can calmly, accurately make the shot, with a large enough caliber(magnums not needed) then go for it. Be truthful with yourself, or otherwise stick with chest shots.
Also NEVER attempt any thing other than a chest shot with a bow. NO neck, front on,or shoulder shots with a bow.