OK fellas, results are in. I only had two Fed. #6 copper plated turkey loads left.
Using Hunter specialalties turkey target, first shot at 35 yds. Before forcing cone job, 3-4 hits brain/vertebrae. After forcing cone job, 7 hits in brain/vertebra. That alone justifies the smith work.
Second shot with the Federal 6's at 40 yards. 4 hits brain/vertebra.
The federal shells are 2 oz. while the HS shells are 1 1/2 oz.
Hevi shot put roughly twice the killing pellets in the kill zone with less shot and less recoil.
These results are in my Encore. I suppose results will vary between barrels and different tubes.
When I first tried this turkey barrel, I wasn't very impressed. Because I read here someone had the barrel's forcing cone lengthened with good results, I had it done. Thanks for the info.