Do you know how much your arrow drops? With this calculator you can get an idea how much. The preset values are based on DBB 400/400 concept in his 2nd book, but should be changed to your own equipment. Play with the Shooting Angle, set it to 0 and the Yardage Steps to 1 and get some eye opening results.
NOTE: The "Shooting Angle" is based on horizontal being 0 degrees.
NOTE: If you enter values outside of the input range, the values will be reset to either the min or max. For example the "Initial Speed" range is 10 – 800 yards If you enter less than 10 the value will change to 10 and if you enter greater than 8000 the value will change to 800.