8/29/15 @ 2:00 PM
8/30/15 @ 2:36 PM
8/30/15 @ 11:42 AM
A2+B2=C2 20 feet up and a 20yd (60feet) = 63feet or 21yds. So while the actual distance is 21yds gravity only affects the arrw in the horizontal plane so it's still shot for 20yds. Put the 20yd pin on it and kill it!
So to answer your question yes I see no reason to need an incline feature on a rangefinder for treestand hunting.
The reason you need to use the 30yd pin is because the target is shot for 5 feet.
Edited on 8/30/15 11:43 AM