Every gun is different. Look down the page and you'll see about a million combos to try. I'm shooting an 870 Super mag with a 28" barrel and it does real well with the Winchester Longbeards in #6 with a Truglo SSX .643 choke. IF I wasn't so cheap, I'd shoot Hevi 7's in it an really get a high pellet count. My buddy is shooting #5's in his 1100 with a 26" barrel, getting very good results. Pattern pic was before I tweeked the sight a tad so POA/POI was off a little. If I'd have just drawn a 10" circle around the densest part of the impact area, pellet count would have been better. Good luck!