Here's some basic rules:

When in the woods and you a see buck and you say to yourself, "Holy ****!", don't worry about his score, just shoot.

Buck's average span from outside ear to ear is 16".

Prior to shooting and if you are trophy hunting, it's nice to have good optics and a quick mind attached to your trigger finger. You're going to have to examine his brow tines, possible broken/missing antlers, spread, mass, tine length and beam length all in just a few seconds. If you shoot too fast or not enough, you can be frustrated at your decision. Practice looking at these every time you see a buck, then when the shooter comes by, you've quickened your skills to determine "if" he really is the shooter you are looking for.

Would share more, but hitting the gun range to sight in and get some practice.

iSnipe