I'd thought about that also.... problem is that most hardware store springs are steel and therefore might scratch the steel bore liner. Decided to go with the softer bronze for that reason. Also, it is non-sparking as if that is really a concern. Being 1/8" diameter will also be about the right size for making up a couple vent picks.... non-sparking IS a concern there. Dirt cheap too.... the welding store sells it by the pound.... 8 sticks for $6.50.... sure won't ever need to buy it again.