Federal 12 Gauge TruBall Low Recoil Slugs Dissected And Discussed 

So Federal keeps their slugs centered to their proprietary wad systems with the TruBall that allows communication with the wad in internal ballistics. But wad separation and TruBall drop out are assured in external ballistics...Here is the Federal Low Recoil Slug dissected and discussed...Once correction - The powder charge was 21.6 grains, not the 22.6 said on the video...