3", 2 ounce of Hevi #6s, and Hevi #7s shoot great! (My SBE likes both though it doesn't shoot the Mag Blends worth a flip for some reason).
Winchester Supreme 3" 1&3/4oz. of #6s do O.K.. The red hull 3" 2 ounce loads of #6's shoot better. I haven't tried the Longbeards yet, because what would be the point? It already throws a fine pattern with the Hevi shot and the Supremes.
It doesn't like the Federal Flitecontrol wads because the constriction is too tight and the patterns are just wildly erratic for me to mess with. The old lead Federal plain lead Strut Stopper 1&7/8 oz. of #6s do good enough (but not as even as the Winchesters). The (pre Flitecontrol) Federal 3" #6's shot great, but I ran out of them a few years ago.
It refuses to shoot anything Remington well & I tried #4's, #5's, and #6's with multiple choke constrictions. I don't know what's going on there, but there's already a few good options to go with. Somebody whose gun shoots Remingtons well can have my share.
I hope this helps.
Jim