Hi Chuck,
I understood what TW was talking about. It's the idea that all the birds travel the same distance when they are broken so the shot has to be the same amount ahead of them to break the bird, the only difference being that the angle is different on low 6, for example. The problem with that unworkable idea is first of all, it's based on a fallacy. All birds are not broken in the same spot and not at the same distance from the shooter. Low 1 and high 7 are broken much closer to the gun than birds from 3, 4 and 5. Both birds from 8 are broken much closer to the gun also. Using 4', for an easy number, to break both targets from 3, 4 and 5, you can not teach a shooter to break the rest of the birds with a 4' lead. Shoot 4' in front of high and low 8, low 1, high 7 and see how many birds you break. Low 7 is a straightaway(as near as one can be) and high 1 just requires about 6" under.
There's a reason that the leads usually published in serious books are pretty similar from one authority to another and vary by station. It's because they are based on physical and mathematical facts, not on perception.
