I have a Remington 870 12ga with a 26" barrel on it and making it a dedicated predator gun. I have shot #4 federal blue box 3" buckshot at 30 yards.These shells have a wad in it unlike most buckshot so maybe that will help with patterns? I think there was 5 pellets in the paper plate. I know I could get a tighter group but what choke tube and size would you go with? I been looking at kicks howler, kicks buck kicker (I think that is it), and Carlson dead coyote. I did read the above sticky but I would like to hear from you guys and gals. I also am putting a set of tru glo sights on the shotgun to help out with the patterning and of course low light. I am new to this so if some educating needs to be brought up I am all ears!