I have an Encore but not the turkey barrel yet. Have been reading and it seems the .640 Hastings choke with #6 Winchester HV is a good setup. Granted each gun will like something differn't. The Encore shotgun barrels take the same chokes as the Winchester & Mossberg 500 so there are plenty of options out there.

I'm actually thinking of getting the new 20 guage turkey barrel from Fox Ridge for mine.