Try at 40 and see what it looks like..... your numbers in a 10" circle. For 30 yards and nitros, that looks a little open.... no offense. Unless your looking at only shooting 30 yards, then it looks good, but I wouldn't have spent on nitros for that....
This is my 870sm with 26" barrel, win. sup. hv #5's through a kicks GT .665 @ 40 yards with a dirty barrel.....regular ole lead....