Why these three loads? Because I needed at least 6 rounds of each and these were what I had on hand.
We planned to shoot them at three ranges, 5 yards, 10 yards, and 25 yards, out of both barrels.
We know from our past experiments, that the pattern of the buckshot will increase at approximately 1 inch per yard of distance. So, we expect to see "approximate" patterns of 5 inches at 5 yards, 10 inches at 10 yards, and 25 inches at 25 yards.
We want to see if the rifled barrel causes to shot to spread out more and also see if it causes "donut" patterns due to the rifling "slinging" the buckshot out more.