YS, you are right, and I shouldn't have worded that the way I did, and I might be making a false assumption. I do know that when hevishot first came out there was a lot of concern that it was harder than lead and was gonna scratch barrels. One choke manufacturer warned not to use it in his chokes. 15 years later, I never hear it mentioned. Hevishot is only about 12g/cc.

Kyle Smith warned that tss was even harder and had all sorts of disclaimers on his site that he was not responsible for a scratched barrel. I have heard people say they have seen scratched chokes, but never heard of a barrel being scratched. For me to assume that the 15g shot Federal uses is in between the hardness of hevishot and tss might indeed be wrong, and thanks for pointing it out. Maybe Hal will read the thread and tell us.

But I still don't think a properly tested tss load is any more dangerous to the user than a lead load. Again, I could be wrong.