Sup guys second post on here but been lurkin for a while. Was having trouble with my remington 870 w/21" barrel. Decided to clean the barrel using the scott bright pads and WD40. All I can say is it works. The best pattern I got prior to the cleaning was 107 in a 10" circle at 40 yards with kicks .655 choke and longbeards #6. After cleaning it jumped to 223. I tried three different chokes the kicks .655, indian creek .665, and a redhead blackout .660, I cannot remember the numbers for all of them but if you need pics let me know. I tried longbeards in 4,5, and 6 in all the chokes.