A friend from high school used to hunt muzzle loader season here in south Florida with a double 12 gage. He told us that he never could get a very good group with buck shoot, so he took wire fishing leader and made a hoop then split the buckshot like split shot fishing weights and clamped them equally spaced around the circle of wire. He stuffed the whole mess down the barrel, he swore it always made a good group. How could it not? When he was shooting the 12 double I stayed far away.