I was thinking that barrel length really didn't matter so I just bought my friend's 20" 835. I tried various 3" loads in #6 and #5s and a few #4s, nothing put more than about 70 pellets in a 10" circle at 40 yards. Tried a pure gold .670, the factory stock .695 and a primos jellyhead .690 choke. Finally broke down and got some hevi-13s and with the jelly head, put 102 #6 pellets in the 10" @40 with a 2 oz 3" shell, and 165 #6 pellets in the same circle at the same yardage. Now I can sleep well until the night before the season opener.