Seen this, I have personally not tried tss yet but am thinking of giving it a try.

http://coyotestuff.com/tss-shot-penetration-testing/

The few rounds I patterned for turkeys hunting patterned better than anything i ever saw. But those shells will cost you more Than 50 bmg.

I have been using it for coyotes since January. I am using the #4 1 1/2 oz Apex 20 ga load. It has worked very well on the coyotes we have tried it on. It patterns very well and I would not hesitate out to 60 yards. All that we have shot with it has been bang/flop. No runners so far.

Dang this guy seems to have came to the same conclusion I did in the late 70’s. Number 2 shot is the deadliest shot size taking into consideration number of pellets on target and overall pattern. Yes I didn’t have tss back then but copper plated bb and various size buckshot was tested .

He should compare the same shot sizes for this to be meaningfully. TSS is just another really expensive load he's trying to sell or justify spending money on.

DAA doesn't sell TSS shot. He does smoke coyotes with TSS and he uses a .17 remington. He has great information he readily shares on his website and on a few forums.