Lead Shot Substitute for Loading Speaker Cabinets?


I have just about given up trying to find lead shot to fill my Von Schweikert VR 4 Jr speakers with. Two questions. Does anyone know where to purchase 100 pounds of lead shot? Are there acceptable substitutes for lead shot when filling up speaker cabineets? Sand maybe?

Thanks in advance.
jaymark
I am in California and found lead shot at gun stores however it was so expensive I decided to try some substitutes. I ended up using Daisy BB's. If I was to do it again, I also would consider using good ol pennies.
Csmgolf:

The dust from silica sand is toxic (this is not new news).

This said, I've used and preferred it in speakers (over lead shot and shot/sand mixtures).

Used a damp paper breathing mask when working with it and performed the work outdoors.
If you couple the speakers properly then you don't have to fill anything, worry about toxic abuse or the dark slow muddy sound of over damping a circuit or a speaker. Tom
if they sound good to you,don't load with anything. try changing placement and if they don't sound good to you, 'filling' will not cause a revelation....only a heavier speaker that you don't like anyway.
Actually I LOVE these speakers. I am just trying to coax a little more out of them...maybe on the low end...