After I completed the evaluation of 32 different chokes and 6 different shotguns with WLB shells, I did the same thing with Hevi-13 shells. You may see some of the results with the WLB shells in the latest issue of "Turkey Country" magazine, the March/April issue.
Frankly, all the chokes through all the different guns did quite well with the WLB shells. Most chokes threw good to excellent patterns with few if any 2" or more gaps in the 10" pattterns and most had good to excellent "halo" patterns our to 16" to allow for either shooter error or turkey movement.
I think you'll find the Hevi-13 results equally interesting.
Thanks,
Clark