Texadillo....I don't rely on TID, just an option that is handy sometimes to ID empty .22 rimfire shells. I hunt a lot of old houses and abandoned one room school houses, torn down old churches etc. and I'll be darned if every kid didn't have a .22 rifle in those days. It gets overwhelming in some places, easy to ID on the Toltec 100... the needle doesn't even move on the meter and it saves my back.