Someone in another thread asked about this combination so I thought I would post my best pattern and test results from a couple years ago.
This is a Mossberg 835 24" barrel. Bore is highly polished. Temp at time of testing was in the 70's. Distance was lasered 40 yards. Shells were Winchester XRHD 3.5" #6. Circle is 10". Three rounds were fired from each tube. Bore was swabbed with dry 10ga bore snake three times between each round.
Indian Creek Black Diamond .675 Low 216, High 225
Pure Gold .670 Low 180, High 194
Kicks Gobblin Thunder .670 Low 173, High 188
Kicks Gobblin Thunder .680 Low 158, High 171