Out of my 870 and 11-87 I use .
For close work (decoying ducks and geese) I use a Briley extended IC
For longer range I use Briley extended Light Mod
For pass shooting I use a Briley Extended Mod
Patteren your gun / choke /shells
Every gun and choke are a little different
In patterening shells over the years I have seen patterens that a flock of ducks could fly thru.
Extended tubes produce better patterens ,some times with lots less choke.

Johnch