Free: Contests & Raffles.
This is what you need for it: http://www.niceshotinc.com/
Forget the bear spray, use wasp killer. Concentrated delivery stream, 10X the product, and only $3.00 on sale.
they make steel shot specifically for vintage guns. bought some at white elephant the other day. may be worth a shot.
3) steel shot can't be shot through anything less than a modified choke on a gun that isn't rated for steel because of 1 and 2