My experience, though perhaps not as extensive as some, is that a reduction in velocity most often brings on an increase in pattern % while an increase will often reduce it a bit. A reduced payload at an increased velocity will often drop the density a good bit. Also keep in mind that for this purpose its not what goes into the 30" circle thats so important, but what goes into the central core. As a general rule a tighter choked gun is far more apt to have a higher Central Thickening to the pattern.


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