I will not argue the point that "Central Thickening" is a misnomer. However it has been in use for so long I think everyone understands the term. Sort of like a double action revolver has changed from its original meaning.
No problem with accepting that all patterns/groups follow a similar type of dispersion.
So, if you look at two patterns from widely differing chokes and shot at the distances where the patterns have equal diameter, you will find the patterns are indistinguishable.
This statement is going to take a bit more explaining to an old hillbilly. I simply find it unbelievable that load with a 10.5:1 ratio would ever be identical to one having a 2:1 ratio at any at range. Other factors also have an effect on the pattern, a major one being the choke. Seems obvious that some influence comes into play when dropping from the 28 to the .410. My "Personal Opinion" until proved otherwise is the major factor here is the much higher percentage of the shot which come under direct influence of the choke.
