I don’t believe in that whole TSS choke business. It sounds like a marketing ploy to increase sales. I’ve been running heavier than lead loads through an old Colonial Star Dot choke in my Mossberg 500A ever since the heavyweight loads came out and I’ve never had a single issue with that choke tube.Just remember with the TSS you need a choke thats rated for it. Thats the only thing that's kept me from getting any yet. I've been thinking about getting some but those Longbeards in #5 shot are cheaper and deadly.