Haven't even experimented w TSS.
Still have WW HV 4s and some Magnum Blend Hevi shot to use up LOL.
First tom yrs ago shot w reg full choke 1100 mag and 5s, was around 20 yards. Killed a few more and switched to 4s and Superfull Remchoke on 870 supermags ( only ran 3" ).
I like tss. I use a tss choke too. works well at longer ranges. dang expensive though and hard to find at times
They had them at PSA the other day when I was there. Somehow, I just can't see myself pulling the trigger on a $12 shotgun shell. Somehow, I've gotten by for over 40 years with lead 2's, 4's, 5's.... guess I'll stick with it. If I need more range I'll use my .25-20.