I am shooting a 573gr arrow. Using feathers and light shaft, I am around 22-23% FOC. The sight tape for my Black Gold is the 258fps tape. I dont actually know my velocity. Just have not checked it, as it tends to lead to chasing #'s. Anyway, my 20-60 yard marks are dead on, but beyond that they dont drop as fast as the sight tape marks. At 70 yards its about the 68.5 mark, and at 80 its at the 77 yard mark. Is it usual for an arrow to not drop as fast? I know I can get custom sight tapes made, but I will never take a shot that far at an animal. Probably wont shoot one past 40. Too much can happen at those distances with white tails. I am curious to see if this is the norm. I have two bows that do this with feathers. I have not shot vanes with my heavy arrows. I might do an experiment. I do remember when comparing 400 gr arrows, the feathers had a lower impact at 40 yards and beyond. Just trying to wrap my head around the physics of it.