Have yet to shoot one with TSS, but according to what I’ve read it will penetrate like lead #5s, because of ita density, hardness, and perfect shape. In my patterning tests, I was able to put a dozen or more pellets in the head and neck of a turkey target out to 40 yards. Lead? Dunno about the penetration, but if enough pellets land in the right spot at 25, I doubt a turkey is gonna like it. Still, since you have the shells, why not use the ones that will penetrate the best and carry the most energy?
YouTube has scads of TSS videos, including .410 ones. Watch some and see what you think.
No doubt! I spent $60 on those crazy things. You betcha they'll be in the chamber and magazine!
