Ammo, ballistics and reloading.
These threads never seem to stay on track, but ideally, the person with the correct answer gets to ask the next question.
I'll take the liberty of going first (no google-fu, ya miscreants).
First marketed in 1890 by the Laflin and Rand Powder Company, "Infallible" has survived two company changes and one name change. It's still an extremely popular powder in pistol and shotgun, with some limited use in light rifle loads. What's it called today?