Other sources derive the word from warg-wolf, where warg (or later werg and wero) is cognate with Old Norse vargr, meaning "rogue," "outlaw," or, euphemistically, "wolf". A Vargulf was the kind of wolf that slaughtered many members of a flock or herd but ate little of the kill. Herders had to destroy the rogue wolf before it took out an entire block of lambs, using what means they had at their hands.
You do what you have to do. But it helps if you have the proper tools.
But I was thinking, if the "casting lead" thing doesn't work out, I could always try Silver.