The Virginia in the Civil War Message Board

The distance of shot that killed Sedgwick?

Hello all,
We have al heard of the famous sharpshooter shot that killed General John Sedgewick. Is the actual distance of that shot known for sure? I have heard and read various yardages for this, everything from 500 yds to 1200yds, but does anyone know? Has anyone ever paced off the distance from where Sedgwick was shot to the area the Sharpshooter was in?
Just curious,
Dave