Any experience out there in terms of the patterns of 00 Buck and 000 Buck? The gun that I will use (when I get some time ) is an improved cylinder 18" 870 Police. I have three different loads: 12 pellet 00 Buck, 9 pellet 00 Buck and 8 pellet 000 Buck. Just wanted some feedback so that when I do it I will have something to compare it to...thanks.