The thing I suspect will prevent this from being an issue for sports shooters is that I'm not sure the energy in typical sport shooting calibers is enough to in

The thing I suspect will prevent this from being an issue for sports shooters is that I'm not sure the energy in typical sport shooting calibers is enough to induce micro-TBIs. Sports shooters who shoot larger calibers, ie a 7.62 NATO or higher in terms of sound energy, are typically shooting relatively few rounds at a time. Those who shoot a lot of rounds typically shoot smaller calibers. Now, I think you might have a point when it comes to competitive practical/dynamic shooters[1], who shoot open division with hot .40 super loads or similar. Especially those, like in my club, who train a lot in indoor ranges. However these would make up a relatively small percentage of the overall recreational shooters out there I imagine. [1]: https://en.wikipedia.org/wiki/Practical_shooting https://en.wikipedia.org/wiki/Practical_shooting