ORIGINAL: Roskoe

The drop is a little more at 30 yards with the heavy arrow; and it goes down hill from there. At 70 yards, the heavy arrow impacts a couple of feet lower. I would speculate there is a good chance you can squeeze in another 10 yardsby going to that much lighter of an arrow. With 400 grain arrows, there is 22" difference in actual drop going from 60 yards to 70 yards out my bow. The gap between 70 and 80 is probably aroun 30". I'll bet your bow will have right around 30" less drop at 70 yards than it has with the heavy arrows.