[Coda]

Oh, no, no, E=mc^2 IS useful, just not for the kinds of chemistry you can do in a basic lab. Nuclear chemistry is a totally different beast.

Pellet doesn't add to the mass of the one-shot example, because it's already fired the shot by the time you calculate it. 10-shot example you should have gone from 250 to 259 instead of 251 to 260.

I'll check your math later, I've gotta run right now.