It's a fun little game, though I don't 100% agree with their "perfect" shot placements, one rule of thumb I always use it aim for the off side leg on a quartering away deer, quartering to, well, I'll try to take out the near side leg, hugging against the lower part of the shoulder blade. From elevation, I think you need to think as much about the exit point as anything, sharper angles are certainly tougher, no doubt.