I am not sure that the discussion of pattern variability is JUST about choke. Bill Nittler regulated the barrels of a couple of guns for me and he said that the interior profile of the entire barrel had an influence on the patterns obtained. He actually was able to produce the exact pattern percentages (within 1 % - 2%) that I requested with the ammunition that I provided.
My question is... how much actual variability is there between patterns produced from the same gun under repeated, identical test conditions??
