Stan;
I guess we'll just have to agree to disagree on this one. A shotgun barrel is a simple tube. I have a copy of Brister's Art & Science & have yet to see a single thing which has proven any magic to a 28 ga bore. He did indicate some shorter shot strings with the 28 "BUT" also with 12 gauge Winchester Mark 5 shells. Careful study will I believe reveal that in both cases these were "Premium" loads utilizing harder shot than most of his other tests. Overall these tests where his wife was towing the target on a trailer were simply to limited to be truly significant.
Bottom line is the bigger the hole the greater its capacity, proportional to the Square of their diameters. 1 5/16 oz of shot in a 12 will have the same column length in the bore as 3/4 oz in a 28. The 28 will have a higher proportion of its shot in contact with the bore walls, also the choke. This very well explains the smaller bore having a higher concentration of its shot toward the center. Still nothing Magic, which cannot be explained regarding bore diameters. The further one wants to shoot the bigger the hole they need in the barrel. As Robert Rurak said, "Use Enough Gun", don't count on Magic.
