We are told in the original post that the round white dot aiming point is one inch. Knowing that, all you need to do is hit Ctrl + or Ctrl - to scale that dot in the photo to a ruler or piece of graph paper or the like.

Assuming the greatest concentration of shot is the center of the pattern, it is pretty easy to figure that the center of this particular pattern is about 7 inches above the point of aim at 25 yards. It would be a bit less at 40 yards, but still more than I'd like. So now the problem is how best to correct it.

Voting for anti-gun Democrats is dumber than giving treats to a dog that shits on a Persian Rug