Stan;
I would guess that this would be possible, but will have to say I have simply not done enough pattern testing at a level to make any real conclusions. One question in my mind is if a similar shot loat is fired through different bore sizes, can a statistical probability of pattern distribution (basically central core thickening) be established. In my mind, I would expect the largwer bore to give less core thickening than the smaller bore, but have not actually proved this to be the case.

Miller/TN
I Didn't Say Everything I Said, Yogi Berra