A deer's front shoulder covers about 1/2 of the heart and when selecting where to shoot, I aim for the 2:00 position of the front leg - placing the crosshairs straight up the rear portion of the front leg and squeezing the trigger when they are about 1" below the top of the shoulder.
Aim for the heart. If you're a little off, you still hit the lungs, anyway. Also, if the deer jumps the string, better chance of a hit if you aim for the heart. (imo)
Dave has a excellent point, however, I always aim for lungs but aim low in case the deer ducks at the release, actually they jump but they will be crouching when the arrow arrives unless its a long shot or they catch movement of your draw.
Have you thought about a trip out west for big game? Have you dreamed about what it might be like to ride horseback through the beautiful Rocky Mountains, while looking for deer or elk? Have you dreamed maybe of traveling to Canada for a moose, elk, bear or deer hunt? Have you wondered what it might be like to see the wild Alaskan bush?
Well, I have a little advice for those who have wondered those, or similar thoughts. JUST DO IT!! If you think you might enjoy it, my bet is that you...