what choke for 20 ga M1?

[Tbrom]

I picked up a Benelli M1 for my daughter last year. She shot it with the factory full for the season. I am going to get a new choke for her this year and I wanted to hear what combos others with an M1 20 ga are shooting.
Thanks
Tim

[dj-il]

Mine shoots Hevi-13 6's with a swarm choke tube, never counted pellets but killed many turkeys with this combo over the years.  Farthest one was 42yds, farther than I thought when I pulled the trigger.