My Trulock tubes for some reason pattern the cheaper Remington express 3" loads wildly better than the Federal Premium stuff. That may have something to do with using regular shot chokes and not a buckshot specific tube.
With the stock tubes buckshot was good at 25 yards max. I tried Trulock Full, extra Full and .670 turkey tubes and 40 yards is it for buckshot. Some guys are posting results of other brand tubes and getting tighter patterns. I have not seen results for the Trulock buckshot tubes.
The turkey tube does work really well when shooting turkey loads and amazingly well with 1oz 6 shot game loads out at 40 years.