40mm (and 20mm)

So I was looking for "sin stocks" to invest in this morning, and came across a link on a website for thematic investing (motif) that had National Presto Industries under "Guns & Ammunition".  Their site is for crockpots.  Well, it turns out from their investor info that one of their subsidiaries, AMTEC, manufactures ammunition for government contracts.  Apparently they also manufacture 20mm cartridge brass!  Information comes from the strangest places.