TSS shot would be an option for a 410 for turkey if it were legal. However the added cost for any larger gauge is really not going to do much more for you, patterns with todays lead ammunition are dense enough. Sure lead is 11g/cc and tss is 18g/cc so it is in fact heavier but there is a caviat. Lead deforms and deformation transfers energy, tss does not deform. So for other types of game such as ducks where you are not doing the typical head shot there is not a huge advantage. Think of it like a expanding bullet vs not expanding, one tranfers energy and the other just penetrates better. TSS loves to boast its penetration into gel as a selling point but penetration and energy transfer are two different things.