Something I like to do when shooting 3D' s is if you have 20,30,40,50 yard pins, stand exactly 20 yards from your average deer 3d target hold your bow arm out as if you were to shoot and see how many of your pins are " on" the deer between the top of its back and the belly of the target. At 20 yards probably ALL of your pins fit between the top of the back and the belly. Now back up to 30 yards, you' ll probably notice your 20 yard pin is at the top of the back and your 40 yard pin is near the belly and the 50 is below the target...

Do this at all ranges and make a mental note or even write down how many pins are on your average 3d target at known distances. This is not a substitute for practice judging distances but it can help confirm your guess or may bring to your attention when you have greatly misjudged the distance saving you an arrow.

A real good 3D shooter once gave me this very good advice (he' s a Hoyt pro shooter) when in doubt, use your 30 yard pin!