ORIGINAL: fetzeriiif
If you know the speed of the arrow, the actual weight of the arrow will make little difference. I realize that no calculator is perfect for everyone, but you shot high at 30 yards with a 25 yard pin, so there is probably more shooting error than calculator error. Although at the longer ranges you shot, 50 yards, your arrow weight will start to make a bigger difference.
That was, after all my roughly, 25 yard pin.
The feathers I feel will make a bigger difference at longer range as well.