Im trying to make a mil drop chart out to 100 yards for my umarex airsaber. I used IBM ballistic program put it only went down to 500 fps. It was close enough to get me on to 70 yards. So at 460 fps 5 ft from the muzzle sighted in at 20 yards exactly it takes exactly 12 mils elevation at 70 yards. That should at least get the b.C. arrow weight 376 grain. All the arrows program s online were in inches ahhh in not even moa. I think I'm going to put my cold shot adjustable base on my airsaber to get enough adjustment to go.to a 100 yards