Lee totally screwed up the artillery prep before Pickett's Charge, leaving it entirely to a 25(?)-year old. Instead of shooting directly at the Union line, resulting in under and over shots completely missing their targets, the shooting should have been at angles, giving under and over shots a much better chance of hitting something. And why the hell did the attack start in the afternoon? First thing in the morning is best for that sort of thing.
as an old "redleg",i.e. former ARNGUS artillery officer for 2 years, your post makes no sense, given the primative sort of artillery available in 1860s.