RE: arrow trajectory?
dohcrxl: this is the way i do it and i dont worry about my stand height.
I sight my pins in on the ground at 20-25-30-35-40...then when i am putting up my stand i measure distances from the ground (ie. 23 yds from the base of the tree to the trail. Then when i go to shoot I dont need to worry about how high up my stand is I just split the difference between my 20 and 25 yd pins. This is all assuming the ground is relatively flat.....If you are hunting on the side of a mountain, then you do need to worry about how high it will be.
Any easy wayto remember how high it will shoot is that is will be the horizontal distance from you to the target. So if your are 30 yds up a tree and the deer is five yds from the base of the tree, if you use your 30 yd pin...it will be like shooting at your target from 5 yds with your 30 yd pin.
hope this helps