I agree, if you're practicing for hunting always from low gun. Then the fit of a shotgun comes into play.
So you have pattern testing to see what loads your shotgun is throwing and where, which encompasses sight picture plus you have the fit and balance of the gun itself. A lot of factors to consider.
But I'm still inconsistent while hunting even after an enormous amount of weekly practice. A fast ball crossing from right to left, one shot. Next bird went straight out from me and right over the center of the plate and I fired twice and barely hit it with my second shot. Next a slow curve ball from left to right missed both shots. Bad habits die hard regardless of rib construction.
