RE: Bird Shot Ballast?
Do you need lead shot? Or just lead. I cast my own lead bulbs from a mold I made. Eay to do.
For lead I use fishing sinkers. 5 x #6 snapper sinkers. They weigh 400grams each so 5 = 2 kg. Or (convert 2.2lb = 1 kg) nearly 5 lbs. Cost me $2.50 each.
Alternately you can use 1mm thick lead sheeting. Cut into series of bulb cross-section shapes and epoxy together. Like laminating. Then file smooth.
If you have to have lead shot. Get together with everyone who needs shot and work out size of order. How many pounds. Contact suppliers and try for a discount for a large order including delivery. Does Dick Cheney live near you? Ask him? Sure he never has a supply shortage.
Larry.