Having dealt with more than one shooter convinced it had to be exactly correct when it was anything but... I will agree to disagree.
I don't think we disagree on much.
At best it is only one component of 'fit' and far from the defining measure of stock fit. I've shot shotguns that 'fit' the crook of my arm but boxed my cheekbone like Sugar Ray because the drop wasn't right for me etc. I will happily agree incorrect drop for a given shooter, combined with a poor angle of the pad or buttplate, can cause more problems than a half inch of length ever will.
Oddly I didn't notice this stuff until my right shoulder was rebuilt a little over a year ago.
