In the Powell interview, she's claiming that for the last two centuries keeping your powder dry hasn't been a problem - oh, since flintlock pistols (because those ones were fucked if you got them wet) went out of style, maybe, but that still doesn't mean that water + gun mixes well. It might be all dramatic to have your gun in the rain or underwater but eeee, for fuck's sakes, clean it afterward so it can still do its shootyness!

I think what she was trying to get at was that since revolvers were invented and guns got more efficient, it wasn't quite so vital to keep your powder dry.

And to think, I knew jack shit about guns until a few weeks ago when I went on a google-rama adventure.