@Rubberhead
For goose...Winchester Last Call TSS18 12ga, 3", 1.25oz, 1500fps, #7 (pure TSS, not a blend). I've found this at Roger's Sporting Goods for $600 a case (100) shells, but they are out now. Least expensive I've seen so far is starting at $660 and going up from there. A year ago they were $480 a case.
Turkey...Federal Premium Heavyweight TSS 12ga, 3.5", 2.25oz, 1200fps, #7...again, pure TSS. I bought this many years ago and stocked up when it was about $25/box of 5. Just guessing, but I believe I have about 100 shells of this in an ammo can. The going rate is around $50-60/box of 5 now.
TSS is not magic. If you miss, it's no different than missing with another shell other than the price you paid for it. I've invested a lot of time at the skeet/5-stand/sporting clays range to make sure my skills are up to snuff. What this translates to is more (non-crippled) dead birds per shot when I hit the field. My friend and I are getting pretty good at head shots when they are flying that prevents any bloodshot meat.
It's all about the density of the material being shot. The reason TSS is so good is because it's more dense, allowing for smaller shot to be used and smaller shot also means more pellets in the shell. I could go on for hours, but
@Mekaniks put the link to my opinionated view on TSS in post #52. If you want to talk, send me a PM and we can exchange info.
FYI - TSS and bismuth are in short supply because China has stopped importing it. Prices are reflecting this supply and demand market. Manufacturers are going with alternate materials like copper, Boss is one of these and I'm sure others will be following.
Hopefully a more reliable source of TSS and bismuth can be found, but until then I'll have to dig into the reserves to take down birds.