Here in Alaska I use a Bennelli M4 and use a CYL choke tube.......since Bear is own my menu. I use Brenneke Tactical Slugs for bear defense and for home defense Hornady Critical Defense OO Buck at 1600 FPS.
The M4 a most excellent weapon.
for close quarters Your Goose loads work great BB shot size and turkey loads with 4 Shot.
I replaced my choke with bennelli M4 Full choke for Buckshot
and a Cylinder for Full size Breneke Slugs
mine likes the 2 3/4" Mag Fed Prem 00 and Winchester XX 2 3/4" Mag 00
I use the benelli cylinder choke in my M4 with Brenneke slugs for bear defense
everything else full for buckshot home defense
and Modified for bird hunting