I'm partial to a gold bead, or gold sourdough- as long as it's gold and not brass or base metal. (I feel that gold has a certain luster that works nicely in a wide range of light in the woods.) I routinely knock beads off of guns I acquire and replace them with gold ones- a small chunk out of the old wedding band, a little solder, and a jeweler's file and presto, a new bead that won't dull or corrode.
